Iraqi forces' fight for Mosul underway

Members of the Iraqi federal police forces celebrate in the Old City of Mosul on July 10, 2017 after the government's announcement of the "liberation" of the embattled city from Islamic State group fighters.

Iraqi security and civilians celebrate while holding national flags as they wait for the final announcement of the defeat of the Islamic state militants, in Basra, 340 miles southeast of Baghdad, Iraq on July 9, 2017. Backed by the U.S.-led coalition, Iraq launched the operation to retake Mosul from Islamic State militants in October.

A member of the Iraqi forces walks through the rubble past humvees, during the offensive against Islamic State group fighters in the Old City of Mosul, on July 10, 2017.

Buildings in Mosul show months of war in this view of the city on July 9, 2017. Iraq will announce imminently a final victory in the nearly nine-month offensive to retake Mosul from jihadists, a US general said Saturday, as celebrations broke out among police forces in the city.

Smoke plumes billow up in the Old City of Mosul on July 10, 2017, during the offensive by the Iraqi force to retake the embattled city from Islamic State group fighters.

Members of the Iraqi federal police dance with children and a national flag during a celebration of the end of military operations against Islamic State fighters in the Old City of Mosul, on July 2, 2017.

Members of the Iraqi federal police dance with children during a celebration of the end of military operations against Islamic State fighters in the Old City of Mosul, on July 2, 2017.

A member of the Iraqi federal police raises the victory gesture dances during military parade celebrating the end of military operations against Islamic State fighters in the Old City of Mosul, on July 2, 2017.

Members of the Iraqi Counter-Terrorism Service cheer as they carry upside-down a black flag of the Islamic State group, with the destroyed Al-Nuri mosque seen in the background, in the Old City of Mosul on July 2, 2017.

Members of the Iraqi Counter-Terrorism Service gather outside the destroyed gate of the Al-Nuri Mosque while others inspect the interiors, in the Old City of Mosul on July 2, 2017, during the Iraqi government forces' offensive to retake the city from Islamic State group fighters. Explosions on the evening of June 21, 2017 leveled the mosque where Abu Bakr al-Baghdadi gave his first sermon as leader of the Islamic State group, along with its ancient minaret.

A man walks by destroyed vehicles in a street in the Old City of Mosul on July 2, 2017.

An Iraqi forces member patrols in the Old City of Mosul on July 1, 2017 where they are battling some of the last members of the Islamic State jihadist group in the city.

Iraqi Special Forces soldiers gather before advancing against Islamic State militants in the Old City of Mosul, Iraq, on July 2, 2017.

A member of Iraq's elite Counter-Terrorism Service smokes a cigarette as he walks with an assault rifle inside a damaged building, during the advance towards the Old City of Mosul on June 19, 2017 as the ongoing offensive continues to retake the last district still held by the Islamic State group fighters. Iraqi forces pushed deeper into Mosul's Old City after launching a final assault on the Islamic State group, warning civilians to stay inside and telling jihadists to "surrender or die".

A member of Iraq's elite Counter-Terrorism Service patrols an alley during the advance towards the Old City of Mosul on June 19, 2017.

A member of Iraq's elite Counter-Terrorism Service mans a machine gun as another takes cover inside a building during the advance towards the Old City of Mosul on June 19, 2017.

Members of Iraq's elite Counter-Terrorism Service look out from a window while on a break, during the advance towards the Old City of Mosul on June 19, 2017.

A member of Iraq's elite Counter-Terrorism Service rests next to his M4 assault rifle on June 19, 2017.

An Iraqi forces member fires a 23 mm anti-aircraft gun as they advance towards the Old City of Mosul on June 19, 2017 during an ongoing offensive to retake the last district still held by the Islamic State group fighters.

A member of the Iraqi forces patrols inside a damaged building during the advance towards the Old City of Mosul on June 19, 2017.

A member of Iraq's Counter-Terrorism Service poses for a picture in a skeleton-defaced ski-mask, as Iraqi forces advance towards the Old City of Mosul on June 20, 2017.

Smoke billows as Iraqi Counter-Terrorism Services advance towards the Old City of Mosul on June 20, 2017.

A US soldier advising Iraqi forces is seen in the city of Mosul on June 21, 2017.

US soldiers advising Iraqi forces are seen in the city of Mosul on June 21, 2017.

A bullet-riddled vehicle belonging to the Iraqi forces is seen as troops advance towards Mosul's Old City on June 18, 2017, during the ongoing offensive to retake the last district still held by the Islamic State group. Military commanders told AFP the assault had begun at dawn after overnight air strikes by the US-led coalition backing Iraqi forces. They said the jihadists were putting up fierce resistance.

Smoke billows from Mosul's Old City on June 18, 2017, during the ongoing offensive by Iraqi forces to retake the last district still held by the Islamic State group.

Iraqi forces walks down a staircase as they advance towards Mosul's Old City on June 18, 2017, during the ongoing offensive by Iraqi forces to retake the last district still held by the Islamic State group.

Iraqi forces take a position inside a building as they advance towards Mosul's Old City on June 18, 2017.

Iraqi forces take a position on the roof of a building as they advance towards Mosul's Old City.

Iraqi forces stand next to weapons during their advance towards Mosul's Old City on June 18, 2017.

Residents walking through a damaged street are seen from the inside of an Iraqi forces armored vehicle as troops advance towards Mosul's Old City on June 18, 2017.

A member of the Iraqi forces mans a machine gun turret in an armored vehicle as troops advance towards Mosul's Old City on June 18, 2017.

A member of the Iraqi forces drives an armored vehicle as troops advance towards Mosul's Old City.

An Iraqi forces vehicle drives past a damaged building as troops advance towards Mosul's Old City on June 18, 2017, during the ongoing offensive to retake the last district still held by the Islamic State group.

Iraqi forces walk down an alley during their advance towards Mosul's Old City on June 18, 2017.

Iraqi forces gesture during their advance towards Mosul's Old City on June 18, 2017.

A member of the Iraqi forces walks amidst the rubble during their advance towards Mosul's Old City on June 18, 2017.

Members of the Iraqi forces patrol streets in the western neighborhood of Tamuz in Mosul on May 23, 2017, after the area was retaken during the ongoing offensive against Islamic State group fighters.

An Iraqi soldier plays with an accordion found on the street while on patrol in the western neighborhood of Tamuz in Mosul on May 23, 2017.

Boys ride a donkey as a humvee belonging to the Iraqi Counter Terrorism Service passes by while on patrol in the western neighborhood of Tamuz in Mosul on May 23, 2017.

Members of Iraqi forces walk on the roof of a house on the frontline in the old city of Mosul on May 24, 2017, during the ongoing offensive to retake the area from Islamic State group fighters.

A member of Iraqi forces climbs out of a house on the frontline in the old city of Mosul on May 24, 2017.

Members of the Iraqi forces stand guard in a house on the frontline in the old city of Mosul on May 24, 2017.

A member of Iraqi federal police force takes position in front of an Islamic State militants' position during a battle at Dawasa district in the center of western Mosul city, Iraq on May 24, 2017.

A member of the Iraqi Counter-Terrorism Services holds a position as they advance towards Mosul's western Rifai neighborhood during their ongoing offensive against Islamic State group fighters on May 16, 2017.

A member of the Iraqi Counter-Terrorism Services flashes the sign for victory from a heavily armed vehicle as they advance towards Mosul's western Rifai neighborhood on May 16, 2017.

Members of the Iraqi forces look on as they take position in a neighborhood of west Mosul on May 17, 2017.

Members of the Iraqi forces take position in a neighborhood of west Mosul on May 17, 2017, during an ongoing offensive to retake the area from Islamic State group fighters.

A member of the Iraqi forces runs with his weapon as they take position in a neighborhood of west Mosul on May 17, 2017, during an ongoing offensive to retake the area from Islamic State group fighters.

A soldier walks down a street past debris as members of the Iraqi forces take position in a neighborhood of west Mosul on May 17, 2017.

Iraqi forces deploy in western Mosul's 17 Tammuz neighborhood as they continue their military offensive to retake the northern city from jihadists of the Islamic State group on May 19, 2017.

Iraqi Counter-Terrorism Services advance towards Mosul's western Rifai neighborhood on May 16, 2017.

Iraqi forces take position in western Mosul's 17 Tammuz neighborhood on May 19, 2017.

A member of Iraq's Counter-Terrorism Services gestures after placing a flower on the end of a gun, in western Mosul on May 21, 2017.

An Iraqi military vehicle passes displaced Iraqi boys returning to their homes in West Mosul's Oreibi neighborhood after government forces retook control of the area from the Islamic State group during the ongoing offensive against the jihadists on May 21, 2017.

Smoke billows as Iraqi Counter-Terrorism Services advance in West Mosul's Al-Najjar neighborhood on May 22, 2017.

A member of Iraqi federal police forces shaves his beard during his rest in Bab Jaded district in the center of western Mosul, Iraq, 22 May 2017. The Iraqi forces took full control over the neighborhoods of Hawi al-Kanisa and Najjar, while they continue fighting in five districts in western Mosul still under IS control. Thousands of people fled the city towards refugee camps due to the fighting.

Iraqi military vehicles and troops advance towards the centre of western Mosul, Iraq, 19 May 2017.

Iraqi policemen from the Iraqi federal police clash with the Islamic state fighters, during a military operation in the Bab Jaded district in the center of western Mosul, Iraq, 22 May 2017.

Humvees of the Iraqi Counter-Terrorism Service patrol in western Mosul's al-Islah al-Zaraye neighborhood on May 13, 2017, during a government forces' military offensive to retake the area from Islamic State group fighters.

Members of the Iraqi forces get ready in Mosul's northwestern al-Haramat neighborhood before going to the front line on May 13, 2017.

Iraqi forces inspect a dismantled car bomb in Mosul's northwestern al-Haramat neighborhood on May 13, 2017.

A member of the Iraqi forces stands guard as displaced residents evacuate from western Mosul's al-Islah al-Zaraye neighborhood May 13, 2017.

Members of the Iraqi forces rest in Mosul's northwestern al-Haramat neighborhood before going to the front line on May 13, 2017.

A member of the Iraqi Counter-Terrorism Service secures a building as troops advance towards Mosul's Al-Oraibi western district May 14, 2017.

Smoke billows during the Iraqi Counter-Terrorism Service advance towards Mosul's Al-Oraibi western district May 14, 2017.

Members of the Iraqi Counter-Terrorism Service advance towards Mosul's Al-Oraibi western district May 14, 2017.

Members of the Iraqi Counter-Terrorism Service take position as they advance towards Mosul's Al-Oraibi western district May 14, 2017.

Members of the Iraqi Counter-Terrorism Service prepare ammunition as they advance towards Mosul's Al-Oraibi western district May 14, 2017.

Members of the Iraqi Counter-Terrorism Service stand in a building as they advance towards Mosul's Al-Oraibi western district May 14, 2017.

Damaged buildings are seen through the window of an armored vehicle of the Iraqi Counter-Terrorism Service advancing towards Mosul's Al-Oraibi western district May 14, 2017.

A members of the Iraqi forces guards a position in the northwestern al-Haramat neighborhood of Mosul on May 9, 2017, during the ongoing offensive to retake the area from Islamic State group fighters.

A general view show smoke billowing following a reported air strike on the northwestern al-Haramat neighborhood of Mosul on May 9, 2017.

Members of Iraq's Counter Terrorism Service check buildings as they enter the al-Sanaa neighborhood, west of Mosul on May 9, 2017.

Members of Iraq's Counter-Terrorism Services advance in western Mosul's al-Islah al-Zaraye neighborhood on May 11, 2017 during their ongoing offensive to retake the area from Islamic State group fighters.

A member of Iraq's Counter-Terrorism Services (CTS) flashes the sign for victory as they advance in western Mosul's al-Islah al-Zaraye neighborhood on May 11, 2017.

A member of Iraq's Counter-Terrorism Services walks on a tank covered in empty cartridges as they advance in western Mosul's al-Islah al-Zaraye neighborhood on May 11, 2017.

A member of the Iraqi forces takes a position in Mosul's northwestern al-Haramat neighborhood on May 11, 2017.

Iraqi forces fire from a position on the rooftop of a building in Mosul's northwestern al-Haramat neighborhood on May 11, 2017.

A member of the Iraqi security forces is reflected in a mirror while holding a position on the front line in Mosul's Old City on May 3, 2017.

A member of the Iraqi security forces holds a position on the front line in Mosul's Old City on May 3, 2017, during an offensive to retake the city from Islamic State group fighters.

Iraqi security forces have lunch as they hold a position in Mosul's Old City on May 3, 2017, during an offensive to retake the city from the Islamic State fighters.

A member of the Nineveh Plain Protection Units, a small Christian militia charged with protecting the predominantly Christian Iraqi town of Qaraqosh returns back to his uncle's house in the town which lies some 30 kilometers east of the northern city of Mosul, on May 5, 2017.

A member of the Iraqi forces' Emergency Response Division looks through the scope of a rifle during the advance on the frontlines in west Mosul on May 6, 2017.

An Iraqi forces' Emergency Response Division Mil Mi-28 "Havoc" attack helicopter fires missiles during advance on the front lines in west Mosul on May 6, 2017.

Smoke plumes rise on the frontline as the Iraqi forces' Emergency Response Division advances in west Mosul on May 6, 2017, during the offensive to retake the area from Islamic State fighters.

Members of the the Iraqi forces' Emergency Response Division stand guard at a checkpoint during the offensive in west Mosul to retake the area from Islamic State fighters, on May 6, 2017.

A member of the Iraqi forces loads an anti-tank rocket propelled grenade as he holds a position in the northwestern Al-Haramat neighborhood of Mosul on May 8, 2017, during the ongoing offensive to retake the area from Islamic State group fighters.

A member of the Iraqi forces flashes the V-sign as troops advance through the northwestern Al-Haramat neighborhood of Mosul on May 8, 2017, during an ongoing offensive to retake the area from Islamic State fighters.

A member of the Iraqi forces takes position in the northwestern Al-Haramat neighborhood of Mosul on May 8, 2017.

Iraqi forces hold a position in the northwestern Al-Haramat neighborhood of Mosul on May 8, 2017.

Iraqi forces tanks advance towards the Al-Haramat neighborhood, north of Mosul, on May 7, 2017.

A member of the Iraqi forces secures a building as troops advance.

A member of the Iraqi forces secures a building as troops advance towards the Al-Haramat neighborhood.

A member of the Iraqi forces' Emergency Response Division rides on top of a humvee advancing on the frontlines in west Mosul on May 6, 2017, during the offensive to retake the area from Islamic State fighters.

Iraqi forces take position in the northwestern Al-Haramat neighborhood of Mosul on May 8, 2017.

An Iraqi-modified T-72M tank belonging to the pro-government Hashed al-Shaabi (Popular Mobilisation) paramilitary forces advances towards the UNESCO-listed ancient city of Hatra, southwest of the northern city of Mosul, during an offensive to retake the area from Islamic State group fighters on April 26, 2017. Hatra is the latest important archaeological site to be recaptured from IS. Jihadists had embarked on a campaign of destruction against archaeological sites after they seized swathes of Iraq and Syria in a lightning 2014 offensive. The full extent of the harm to Hatra remains unclear.

A member of the Iraqi pro-government Hashed al-Shaabi paramilitary forces gestures from the modern town of Hatra, near the eponymous UNESCO-listed ancient city, southwest of the northern city of Mosul, on April 28, 2017.

Members of the Iraqi pro-government Hashed al-Shaabi paramilitary forces gather in a street in Hatra.

An Iraqi soldier, from the Federal police, stands in front of a Turkish bath, prohibited and defaced by the Islamic State group, in western Mosul on April 29, 2017.

A mannequin is placed at an Iraqi federal police position on the frontline in western Mosul on April 29, 2017.

Iraqi soldiers stand next to their vehicle in the village of Huleileh, north of Mosul on May 1, 2017.

Iraqi forces' vehicles patrol in west Mosul on May 2, 2017, during the offensive to retake the city from Islamic State fighters.

Members of the Iraqi forces stand on an armored vehicle during a patrol in west Mosul on May 2, 2017, during the offensive to retake the city from Islamic State fighters.

An Iraqi soldier sits inside an artillery vehicle on the frontline in the village of Huleileh, north of Mosul on May 1, 2017.

Iraqi soldiers stock artillery shells on the frontline in the village of Huleileh, north of Mosul on May 1, 2017.

An Iraqi Federal Police soldier runs away after he fired shots at an Islamic State group position on the western side of Mosul, Iraq, on April 29, 2017.

A federal police officer prays, while his colleagues have lunch on the front line in western Mosul, Iraq, on April 29, 2017.

An Iraqi-modified T-72M tank belonging to the pro-government Hashed al-Shaabiparamilitary forces advances towards the UNESCO-listed ancient city of Hatra, southwest of the northern city of Mosul, during an offensive to retake the area from Islamic State group fighters, on April 26, 2017. Hatra is the latest important archaeological site to be recaptured from IS. Jihadists had embarked on a campaign of destruction against archaeological sites after they seized swathes of Iraq and Syria in a lightning 2014 offensive. The full extent of the harm to Hatra remains unclear.

Smoke plumes rise in the background as members of the Iraqi pro-government Hashed al-Shaabi humvee, during their advance towards the UNESCO-listed ancient city of Hatra, southwest of the northern city of Mosul.

A member of the Iraqi pro-government Hashed al-Shaabi paramilitary forces raises the victory gesture during advance towards the city of Hatra, southwest of the northern city of Mosul.

An Iraqi member of the pro-government Hashed al-Shaabi paramilitary forces looks through a scope mounted on the back of a Toyota pickup truck.

Members of the Iraqi pro-government Hashed al-Shaabi paramilitary forces take a break, as forces advance towards Hatra, southwest of the northern city of Mosul.

A member of the Iraqi forces guards the distribution of aid packages for west Mosul residents provided by volunteers on the eastern side on April 21, 2017, as Iraqi forces continue the offensive to retake the city from Islamic State fighters.

An Iraqi forces' Mil Mi-28 "Havoc" helicopter fires flares in west Mosul on April 21, 2017, during the ongoing battle by Iraqi forces to seize the city from Islamic State jihadists.

Members of the Iraqi Federal Police fire mortars towards positions held by the Islamic State on the front line of the attack on west Mosul on April 23, 2017.

A member of the Iraqi Federal Police fires towards positions held by the Islamic State on the front line of the attack on west Mosul on April 23, 2017.

Shiite Muslim worshipers and members of the Iraqi Federal Police commemorate the anniversary of the death of the 8th-century Imam Musa al-Kadhimin in west Mosul on April 23, 2017.

An Iraqi forces helicopter flies in front of black smoke rising from the horizon in west Mosul on April 25, 2017. Iraqi forces retook full control of one the largest neighborhoods of west Mosul from the Islamic State after a week of intense fighting, a top commander said.

Soldiers with the Iraqi special forces look out on Islamic State group positions from a rooftop in west Mosul as fighting continues on April 24, 2017.

Smoke and shrapnel rise from a coalition airstrike as Iraqi special forces battle Islamic State militants from a rooftop position in the al-Tanek neighborhood of Mosul, Iraq, on April 24, 2017.

Soldiers with the Iraqi special forces scan Islamic State positions from a rooftop in west Mosul as fighting between Iraqi forces and the Islamic State continues on April 23, 2017.

A sniper with the Iraqi special forces aims at an Islamic State position inside a house in west Mosul as fighting between Iraqi in the city continues April 23, 2017.

A soldier with the Iraqi special forces looks through the hole of a destroyed house in west Mosul during street to street fighting between the Iraqi forces and the Islamic State continues April 23, 2017.

A soldier with the Iraqi special forces stands against a wall in the city of Mosul as fighting between Iraqi forces and the Islamic State continues on April 22, 2017. The name of the Iraqi governorate of 'Diwaniya' is written on the wall behind him, which was painted by Iraqi special forces from that area after liberating the neighborhood in Mosul from the Islamic State.

Iraqi special forces duck to avoid militant snipers as they battle Islamic State militants from a rooftop position in the al-Tanek neighborhood of west Mosul, Iraq, on April 21, 2017.

An Iraqi special forces soldier moves from a rooftop position to restock ammunition during fierce clashes with Islamic State militants in the al-Tanek neighborhood in Mosul on April 21, 2017.

A soldier with the Iraqi special forces fires a machine gun at the Islamic State group from a rooftop in west Mosul on April 24, 2017.

Iraqi forces, from the elite Rapid Response Division, fire mortars towards Islamic State group positions, during their advance in western Mosul on April 19, 2017, as part of their campaign to retake the city from IS group fighters.

Iraqi forces, from the elite Rapid Response Division, aim their weapons towards Islamic State group positions, during their advance in western Mosul.

A member of the Iraqi forces, from the elite Rapid Response Division, walks down a street during their advance in western Mosul.

A member of the Iraqi Federal police walks down a street in western Mosul.

A member of the Iraqi forces, from the elite Rapid Response Division, makes his way through a hole in a wall during their advance in western Mosul.

Iraqi special forces soldiers wait for a colleague to fire a rocket at Islamic State militants as smoke from an airstrike billows from the site in the in the al-Tanek neighborhood of Mosul.

Iraqi federal police fire a mortar at an Islamic State position during the battle to recapture west Mosul, on April 12, 2017, in Mosul, Iraq. Despite being completely surrounded, Islamic State fighters are continuing to put up stiff resistance to Iraqi forces who are now having to engage militants in house-to-house fighting as they continue their battle to retake Iraq's second-largest city of Mosul.

Iraqi counterterrorism service forces advance towards the Sekak neighborhood in western Mosul on April 11, 2017, during the ongoing offensive to retake the city from Islamic State jihadists.

A member of the Iraqi counterterrorism service forces walks down a street as they advance towards the Sekak neighborhood in western Mosul on April 11, 2017.

Iraqi forces advance in the al-Abar neighborhood of Mosul on April 13, 2017, during an offensive to retake the city from Islamic State jihadists.

Iraqi forces gesture as they stand outside a building during clashes with Islamic State fighters in Mosul on April 15, 2017, during an offensive to recapture the city.

A member of the Iraqi forces maneuvers through the rubble in a street in Mosul on April 15, 2017.

A member of the Iraqi forces climbs out a window of a house in the old city of Mosul on April 15, 2017.

Iraqi forces secure a building in the old city of Mosul on April 15, 2017.

A member of the Iraqi forces reloads a rocket-propelled grenade during clashes with Islamic State group fighters in the old city of Mosul on April 15, 2017.

A member of the Iraqi forces shoots suppressive fire while taking cover behind a barrier made of debris in the old city of Mosul during the offensive to recapture the city from Islamic State fighters April 16, 2017.

Members of the Iraqi forces take a rest during their advance in the old city of Mosul on April 16, 2017.

A member of the Iraqi forces pulls out a chain of large-calibre ammunition inside an armored vehicle in the old city of Mosul on April 16, 2017.

A member of the Iraqi forces wears a gas mask on April 16, 2017, during an offensive to recapture Mosul from Islamic State fighters.

A member of the Iraqi forces holds position in the city of Mosul on April 16, 2017.

A member of the Iraqi security forces loads a TOW anti-tank missile as troops advance towards Mosul's Old City on April 17, 2017.

A member of the Iraqi forces sits in a turret over a humvee in the city of Mosul on April 17, 2017.

Smoke billows from Mosul's Old City on April 17, 2017.

U.S. soldiers from the 82nd Airborne Division lift weights on their base east of Mosul on April 17, 2017. The soldiers, from C Battery, 2nd Battalion, 319th Airborne Field Artillery Regiment are responsible for firing artillery in support of Iraqi forces battling Islamic State militants in Mosul.

U.S. Army Spc. Dan Decker, 23, from Somerset, Kentucky poses with an artillery shell on his base east of Mosul on April 17, 2017. Decker, from the 82nd Airborne Division's C Battery, 2nd Battalion, 319th Airborne Field Artillery Regiment is part of the team responsible for firing artillery in support of Iraqi forces battling Islamic State militants in Mosul.

U.S. soldiers from the 82nd Airborne Division fire artillery in support of Iraqi forces fighting Islamic State militants from their base east of Mosul on April 17, 2017. The soldiers are from C Battery, 2nd Battalion, 319th Airborne Field Artillery Regiment.

An Iraqi special forces soldier wears a rose in his body armor as troops move from the Yarmouk neighborhood to take another district from Islamic State militant control in Mosul, Iraq on April 12, 2017.

Iraqi federal police gesture as smoke rises from the point of impact after firing a mortar at an Islamic State position during the battle to recapture west Mosul on April 12, 2017 in Mosul, Iraq. Despite being completely surrounded, Islamic State fighters are continuing to put up stiff resistance to Iraqi forces who are now having to engage I.S in house to house fighting as they continue their battle to retake Iraq's second largest city of Mosul.

An Iraqi federal policeman fires a machine gun at an Islamic State position on a nearby rooftop during the battle to recapture west Mosul on April 12, 2017 in Mosul, Iraq.

An Iraqi federal policeman covers his ears as an anti-tank rocket is fired at an Islamic State position during the battle to recapture west Mosul on April 13, 2017 in Mosul, Iraq.

An Iraqi federal policeman uses a helmet on a stick to try and draw fire from an Islamic State sniper in an attempt to make him reveal his position during the battle to recapture west Mosul on April 13, 2017 in Mosul, Iraq.

An Iraqi security forces member comforts a boy in Al-Risala neighborhood on March 22, 2017, following a mortar shell attack by Islamic State jihadists on civilians.

Armored vehicles of the Iraqi forces advance towards the Old City in western Mosul on March 24, 2017, during an offensive to retake the city from Islamic State group fighters.

A smoke plume rises in a neighborhood in west Mosul, on March 24, 2017, during an offensive by the Iraqi forces to retake the city from Islamic State group fighters.

Iraqi forces display old banknotes, bearing the portrait of late Iraqi president Saddam Hussein, at the frontline of the Old City of Mosul on March 25, 2017.

A member of the Iraqi forces stands guard at the frontline of the Old City of Mosul on March 25, 2017.

Iraqi forces drive their vehicle down a street on the frontline of the Old City of Mosul on March 25, 2017.

An Iraqi counter terrorism forces member stands guard in Mosul's al-Jadida area on March 26, 2017, following air strikes in which civilians have been reportedly killed during an ongoing offensive against the Islamic State group.

Displaced Iraqi children, who fled their homes in the Old City in western Mosul due to the ongoing fighting between government forces and Islamic State group fighters, are seen looking towards a security forces member ahead of being taken to the Hammam al-Alil camp, south of Mosul, on March 27, 2017.

An Iraqi security forces member flashes the sign for victory as he secures displaced Iraqis, who fled their homes in the Old City in western Mosul due to the ongoing fighting against Islamic State group fighters, as they head to the Hammam al-Alil camp, south of Mosul, on March 27, 2017.

A Federal Police soldiers walks out of a house on a front line near the old city, during fighting against Islamic State militants on the western side of in Mosul, Iraq, March 28, 2017.

A Federal Police soldier lays on a couch before moving to a front line near the old city during fighting against Islamic State militants on the western side of in Mosul, Iraq, March 28, 2017.

A Federal Police sniper aims his weapon towards Islamic State positions at a front line near the old city on the western side of Mosul, Iraq, March 22, 2017.

An Iraqi soldier walks next to a destroyed building which was used by Islamic state group as 'Islamic police station' and a prison, at Dawasa district western Mosul, Iraq, 23 March 2017. Iraqi forces battled IS fighters to push into Mosul's old city, while thousands of civilians fled the city. Iraqi forces backed by US-led coalition airstrikes have retaken the eastern part of the city and about half of the west across the Tigris river, an Iraqi army officer said.

A member of the Iraqi counter-terrorism service gazes on from the turret of an armored vehicle during their advance towards al-Resala neighborhood in west Mosul on March 21, 2017, as part of the government forces' ongoing offensive to retake the city from Islamic State group fighters.

Forces from the Iraqi counter-terrorism service hold position during the advance on al-Resala neighborhood in west Mosul.

Members of the Iraqi counter-terrorism service engage in combat with jihadists at al-Dawasah neighborhood in west Mosul.

An rocket fired by Federal Police Rapid Response Forces explodes near the old city during fighting against Islamic State in Mosul, Iraq, on March 20, 2017.

Federal Police Rapid Response Forces takes position at the entrance of a destroyed house during fighting with Islamic State militants in Mosul, Iraq, on March 20, 2017.

Federal Police Rapid Response Forces fire a rocket towards Islamic State positions near the old city, in Mosul, Iraq, on March 20, 2017.

An Iraqi Army, Russian built Mi-28 attack helicopter fires towards the position of the Islamic state group west of Mosul. Iraqi forces backed by airstrikes from a US-led coalition recaptured many districts in western Mosul, and the fighting has reached into the Old City and around the Mosul's al-Nuri Mosque, where the Islamic State group leader Abu Bakr al-Baghdadi had declared his 'caliphate' in his only known public appearance in 2014.

Iraqi forces, consisting of the Iraqi federal police and the elite Rapid Response Division fires towards Islamic State group jihadists as they advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

A sniper member of the Iraqi forces, consisting of the Iraqi federal police and the elite Rapid Response Division, takes aim during their advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

Iraqi forces, consisting of the Iraqi federal police and the elite Rapid Response Division, advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

Iraqi forces, consisting of the Iraqi federal police and the elite Rapid Response Division, hold a position as they advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

A member of the Iraqi forces, consisting of the Iraqi federal police and the elite Rapid Response Division, secures a building as troops advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

Iraqi forces advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

A member of the Iraqi forces runs for cover as they advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

A member of the Iraqi forces peaks from behind a metal door as they advance in the Old City in western Mosul on March 19, 2017, during the offensive to retake the city from Islamic State group fighters.

An Iraqi security forces vehicle drives through a street as troops advance towards the Old City of Mosul on March 20, 2017, during the offensive to retake the city from Islamic State group fighters. The forces have recaptured several neighborhoods from IS since starting the push for west Mosul last month, but the battle for the Old City, with its warrens of alleyways, was always expected to be tough.

Smoke rises in West Mosul during the government-led offensive to retake Iraq's second largest city from Islamic State group jihadists, on March 16, 2017.

Members of Iraqi federal police fire mortars against Islamic State group jihadist positions in West Mosul during the government-led offensive to retake Iraq's second largest city on March 16, 2017.

A Federal Police soldier runs for cover during fighting against Islamic State militants in western Mosul, Iraq, on March 16, 2017.

A Federal Police soldier shoots toward Islamic State militant positions during fighting in western Mosul, Iraq, on March 16, 2017.

A Federal Police talks on the radio during fighting against Islamic State militants in western Mosul, Iraq, on March 16, 2017.

Iraqi government forces fire a rocket towards Islamic State group positions in west Mosul on March 14, 2017, as they continue to advance in the embattled city combatting the jihadists. Baghdad's forces launched a major drive last month to oust the Islamic State group from west Mosul, a battle that has pushed more than 80,000 people to flee their homes in less than three weeks.

A cloud of smoke is seen rising from buildings as Iraq's elite Counter-Terrorism Service advance towards Mosul's al-Nasser neighborhood on March 14, 2017 during the ongoing offensive to retake the city from Islamic State group fighters.

A member of Iraq's elite Counter-Terrorism Service watches a football while residents evacuate the area as they advance towards Mosul's al-Nasser neighborhood on March 14, 2017 during the ongoing offensive to retake the city from Islamic State group fighters.

Federal Police Rapid Response Force soldiers walk inside Mosul's heavily damaged museum as fighting against Islamic State militants continues outside in western Mosul, Iraq, on March 15, 2017.

A Federal Police soldier holding an RPG watches for suicide car bombs during fighting against Islamic State militants in western Mosul, Iraq, on March 15, 2017.

A Federal Police Rapid Response Force soldiers runs for cover under sniper fire as he exits Mosul's heavily damaged museum during fighting against Islamic State militants in western Mosul.

Iraq's elite Counter-Terrorism Service patrol Mosul's western Al-Samud district on March 15, 2017, as troops continue to advance in the embattled city combatting Islamic State group jihadists.

A Mil Mi-28 "Havoc" helicopter fires flares in west Mosul during the ongoing battle by Iraqi forces to seize the city from Islamic State (IS) group jihadists.

Iraqi troops fire artillery towards Islamic State group jihadists' positions in west Mosul, Iraq.

An Iraqi sniper takes aim towards Islamic State (IS) jihadists in west Mosul, Iraq.

Iraqi security forces guard the destroyed Mosque of The Prophet Younis, or Jonah, in Mosul, Iraq. Iraqi archeologists think that tunnels dug under a destroyed shrine in Mosul by Islamic State militants have revealed the palace of the ancient Assyrian king of Esarhaddon.

A fighter from Iraq's elite Counter-Terrorism Service takes cover inside a building in the Shuhada neighborhood of west Mosul during an offensive to retake the western parts of the city from the Islamic State jihadists.

Iraqi government forces supported by fighters from the Abbas Brigade, which fight under the umbrella of the Shiite popular mobilization units, advance in village of Badush, some 15 kilometers northwest of Mosul, during the ongoing battle to retake the city's west from Islamic State group jihadists on March 8, 2017. Iraqi forces worked to clear bombs and flush out any remaining jihadists in retaken areas of west Mosul to set the stage for an offensive against the Old City. Supported by US-led air strikes, the forces have made steady progress in their battle to seize Iraq's second city from the Islamic State group. / AFP PHOTO / Mohammed SAWAFMOHAMMED SAWAF/AFP/Getty Images ORIG FILE ID: AFP_MH783

Iraqi fighters from the Abbas Brigade fire towards enemy positions in village of Badush.

Iraqi fighters from the Abbas Brigade fire towards enemy positions in village of Badush, some 15 kilometers northwest of Mosul.

An Iraqi fighter from the Abbas Brigade prepares ammunition as they fire towards enemy positions in village of Badush.

Iraqi government forces advance towards the cement plant in village of Badush.

Armored vehicles and humvees of Iraq's elite Counter-Terrorism Service advance in the Shuhada neighborhood of west Mosul during the advance against Islamic State group fighters inside the city on March 9, 2017.

Members of the Iraqi forces patrol areas that they retook from Islamic State group fighters in western Mosul.

Iraqi troops battle against Islamic State group fighters to further advance inside Mosul, on Mar. 7, 2017.

A sniper aims his weapon towards Islamic State group fighters in west Mosul as Iraqi forces continue to fight against jihadists to further advance inside the city, on Mar. 7, 2017. Iraqi forces said they had seized the main government offices in Mosul and its famed museum as they made steady progress in their battle to retake the city's west from jihadists. / AFP PHOTO / ARIS MESSINISARIS MESSINIS/AFP/Getty Images ORIG FILE ID: AFP_MF7OZ

An Iraqi forces member looks at a crater made by an air strike in west Mosul.

Iraqi government forces supported by fighters from the Abbas Brigade, which fight under the umbrella of the Shiite popular mobilization units, advance in the village of Badush some 15 kilometers northwest of Mosul during the ongoing battle to retake the city's west from Islamic State group jihadists.

Iraqi government forces advance in the village of Badush some 15 kilometers northwest of Mosul during the ongoing battle to retake the city's west from Islamic State.

Iraqi government forces advance northwest of Mosul.

Iraqi government forces advance in the village of Badush, northwest of Mosul.

Federal policemen search houses in the old Mosul neighborhood as Iraqi security forces advance during fighting against Islamic State militants in western Mosul, Iraq.

Iraqi security forces advance during fighting against Islamic State militants in western Mosul, Iraq.

Iraqi federal policemen open the road towards the government complex as Iraqi security forces advance during fighting against Islamic State militants in the Dawasa neighborhood in western Mosul.

Iraqi security forces advance during fighting against Islamic State militants in western Mosul, Iraq.

A member of the Iraqi troops stands next to archeological findings inside an underground tunnel in east Mosul on Mar. 6, 2017. Two winged bulls dating from the Assyrians empire were found in a labyrinth of narrow underground tunnels dug by the Islamic State group in east Mosul. The impressive maze of tunnels dug by the jihadists to carry out archaeological excavations is located in the heart of the hill that houses the tomb of the Prophet Jonah (Nabi Younes).

Smoke rises following an airstrike in western Mosul on Mar. 6, 2017, during an offensive by Iraqi forces to retake the western parts of the city from Islamic State group.

Iraqi forces clash with Islamic State group fighters in Mosul on Mar. 5, 2017, during an offensive to retake the western parts of the city from the jihadists.

U.S. army forces supervise during a training session at the Taji camp, north of Baghdad, with Iraqi soldiers, aimed at preparing them to install floating bridges, ahead of installing replacement ones in Mosul, on Mar. 6, 2017.

International coalition forces and Iraqi soldiers instal a floating bridge at the Taji camp, north of Baghdad, during a training session ahead of installing replacement bridges in Mosul.

International coalition forces and Iraqi soldiers instal a floating bridge at the Taji camp, north of Baghdad, during a training session ahead of installing replacement bridges in Mosul.

Iraqi soldiers celebrate on a bridge that they recently regained control of, from Islamic State militants, in western Mosul.

Iraqi security forces advance during fighting against Islamic State militants, in western Mosul.

Iraqi security forces advance during fighting against Islamic State militants.

Iraqi security forces advance.

Iraqi police forces are seen during a military operation at west part of Mosul city, northern Iraq, on March 5, 2017.

Iraqi forces clash with Islamic State group fighters in Mosul on Mar. 5, 2017, during an offensive to retake the western parts of the city from the jihadists. Iraqi forces attacked four jihadist-held areas in Mosul, the latest push in a battle for the city's west that has displaced more than 45,000 people since it began.

Fire and smoke billow following a car bomb explosion as Iraqi forces clash with Islamic State group fighters in Mosul.

A sniper fires at targets during clashes with Islamic State group fighters in Mosul.

Iraqi security forces launch a rocket against Islamic State militants positions during clashes in the western side of Mosul.

A member of the Iraqi police prays as Iraqi forces clash with Islamic State group fighters in Mosul.

Smoke billows in the background as Iraqi forces clash with Islamic State group fighters.

Iraqi security forces fire a mortar against Islamic State militants positions.

An Iraqi Counter Terrorism Service officer of the Golden Division aims an RPG at an Islamic State sniper position in the west Mosul district of al-Mamoun, part of the offensive to retake the city some two years after it fell to Islamic State on Mar. 2, 2017 in Mosul, Iraq.

Iraqi Counter Terrorism Service officers of the Golden Division advance into the west Mosul district of al-Mamoun.

An Iraqi Counter Terrorism Service officer aims at an Islamic State sniper position in the west Mosul district of al-Mamoun.

A donkey spray painted with "Daesh", the Arabic acronym for the Islamic State group, stands on a hill outside Mosul on Mar. 2, 2017, during an offensive by security forces to retake the western parts of the city from Islamic State group fighters.

An Iraqi soldier inspects a recently-discovered train tunnel that belonged to the former Baghdad to Mosul line, that was turned it to a training camp for Islamic State fighters, in western Mosul, Iraq, on Mar. 1. 2017.

Iraqi forces hold a position as troops advance through Mosul's Jawasaq neighborhood on Feb. 27, 2017, during an offensive to retake the area from Islamic State group fighters. Iraqi forces battling the Islamic State group in west Mosul reached the city's southernmost bridge, a key step in efforts to defeat the jihadists in their stronghold, a spokesman said.

A member of the 9th Division holds a position on a hill in Talul al-Atshana, on the southwestern outskirts of Mosul.

Iraqi forces patrol a street in Mosul's Jawasaq neighborhood during an offensive to retake the city from Islamic State group fighters.

Iraqi troops blow up a mine on the outskirts of Mosul.

A donkey walks past a canon on the outskirts of Mosul.

Iraqi troops fire a missile towards Islamic State group fighters from the outskirts of Mosul.

Members of the Iraqi army's 9th Division hold a position on a hill in Talul al-Atshana, on the southwestern outskirts of Mosul.

Members of the Iraqi army's 9th Division fire a multiple rocket launcher from a hill in Talul al-Atshana, on the outskirts of Mosul.

A convoy of tanks and armored vehicles of the Iraqi army's 34th brigade advances near Talul al-Atshana.

Iraq's federal police forces celebrate as they hold a flag of the Islamic State group they captured after regaining control of Gawsaq neighborhood on the western side of Mosul.

A member of Iraq's elite Rapid Response Division opens fire against Islamic State group fighters from an armored vehicle turret in the northern city of Mosul as they continue the offensive to retake the city's western half from IS, on Feb. 25, 2017. The west bank of Mosul is where Abu Bakr al-Baghdadi made his only public appearance as IS leader in July 2014 and proclaimed a "caliphate", which at its greatest extent controlled a third of Iraq, but after more than two years of a government fightback it has become the last major jihadist bastion in the country.

An explosion hits near a vehicle belonging to Iraq's elite Rapid Response Division during the assault to retake the northern city of Mosul, as Iraqi forces continue the offensive to retake the city's western half from IS, on Feb. 25, 2017.

Iraqi forces' armored vehicles advance towards Dindan neighborhood in the western half of the northern city of Mosul, during the offensive to retake the area from Islamic State group fighters, on Feb. 25, 2017.

Members of the Iraqi forces take cover as they advance towards Dindan neighborhood in the northern city of Mosul.

A member of the Iraqi forces raises the victory gesture next to an armored vehicle during the advance towards Dindan.

A member of Iraq's Rapid Response Division reacts during an ongoing offensive by Iraqi troops to retake the northern city of Mosul from from jihadists of the Islamic State group, on Feb. 24, 2017.

Smoke rises in the background as members of Iraq's elite Rapid Response Division hold positions in the northern city of Mosul.

Members of Iraq's elite Rapid Response Division carry a wounded comrade in the northern city of Mosul.

Iraqi special forces arrest a fighter with Islamic State militia in Mosul.

An Iraqi soldier prepare artillery at Iraqi Army base during fighting between Iraqi security forces and Islamic State militants, on the western side of Mosul, Iraq.

Smoke rises after an airstrike by U.S.-led coalition warplanes during fighting between Iraqi special forces and Islamic State militants, on the western side of Mosul.

Iraqi forces, supported by the Hashed al-Shaabi paramilitaries, prepare to advance advance towards the village of Sheikh Younis, south of Mosul, after the offensive to retake the western side of the city from Islamic State group fighters commenced on Feb. 19, 2017.

Iraqi security forces display an Iraqi 25 Dinar banknote, bearing the portrait of late Iraqi president Saddam Hussein, in the village of al-Buseif, south of Mosul, during an offensive to retake the western side of the city from Islamic State group fighters on Feb. 21, 2017. Iraqi forces consolidated positions after blasting their way to the southern edge of Mosul in an assault Baghdad and its partners hope will spell the doom of the jihadist "caliphate".

Iraqi security forces advance in the village of al-Buseif, south of Mosul, during an offensive to retake the western side of the city from Islamic State group fighters on Feb. 21, 2017.

A member of the Iraqi security forces aims his weapon as they advance in the village of al-Buseif, south of Mosul, during an offensive to retake the western side of the Islamic State group's last major stronghold in Iraq, on Feb.21, 2017. Iraqi forces backed by jets and gunships retook Al-Buseif, a village which IS had used as its main base south of Mosul, said Brigadier General Abbas al-Juburi, of the Rapid Response force.

Iraqi security forces are deployed in the village of al-Buseif, south of Mosul, during an offensive to retake the western side of the city from Islamic State group fighters on Feb. 21, 2017.

Iraqi security forces look at a makeshift armored vehicle rigged with explosives after capturing it from Islamic State group fighters in the village of al-Buseif, south of Mosul, during an offensive to retake the western side of the city from IS jihadists on Feb. 21, 2017.

Iraqi security forces drive in the village of Albu Saif, south of Mosul, after they recaptured the village from the control of the Islamic State group on Feb. 21, 2017, during the ongoing military offensive to retake the western side of Mosul. I

A civilian plants a white flag in a berm as he arrives at the defense line of Iraqi federal police forces in the town of Abu Saif after escaping Islamic State territory, on Feb. 21, 2017.

A civilian kisses a federal police officer after escaping Islamic State territory in the town of Abu Saif, on Feb. 21, 2017. Iraqi forces advanced into the southern outskirts of Mosul in a push to drive Islamic State militants from the city's western half, as the visiting U.S. defense secretary met with officials to discuss the fight against the extremists.

Tanks and armored vehicles of the Iraqi forces, supported by the Hashed al-Shaabi paramilitaries, advance towards the village of Sheikh Younis, south of Mosul, after the offensive to retake the western side of Mosul from Islamic State fighters commenced Feb.19, 2017.

Smoke billows in the background as Iraqi forces advance near the village of Husseinyah, south of Mosul.

Iraqi forces advance near the village of Husseinyah, south of Mosul on Feb. 20, 2017, during the offensive to retake the western side of Mosul.

An Iraqi soldier gestures as Iraqi forces advance near the village of Husseinyah.

Iraqi police forces fire from a humvee at Islamic State positions from a hillside outside the town of Abu Saif, on Feb. 20, 2017. Iraqi Federal Police forces have pushed into the southern outskirts of Mosul on the second day of a new push to drive Islamic State militants from the city's western half. Iraqi helicopters were seen firing rockets on Monday at the village of Abu Saif, mainly at a hill that overlooks the city's airport and provides the militants with a natural defense line on the southern approaches to Mosul.

A member of the federal police smokes a cigarette during a break in fighting against Islamic State militants, in Hamam al-Alil, Iraq, on Feb. 19, 2017. U.S.-backed Iraqi forces launched a large-scale military operation on Sunday to dislodge Islamic State militants from the western half of Mosul.

A federal police officer stands inside a damaged house after it was hit by an airstrike, in Hamam al-Alil, Iraq, on Feb. 19, 2017.

Iraqi forces, supported by the Hashed al-Shaabi (Popular Mobilization) paramilitaries, advance towards the village of Sheikh Younis, south of Mosul, Iraq after the offensive to retake the western side of Mosul from Islamic State started Feb. 19, 2017.

Tanks and armored vehicles of the Iraqi forces advance south of Mosul, Iraq.

Iraqi forces advance near the village of Sheikh Younis, south of Mosul, Iraq on Feb. 19, 2017.

Iraqi forces advance an flash the victory sign south of Mosul, Iraq as they begin an operation to try to retake the western side of Mosul, Iraq.

Iraqi forces begin their offensive on Feb. 19, 2017, to take back the western side of Mosul, Iraq, from the Islamic State.

A fighter of the Hashed al-Shaabi (Popular Mobilisation) paramilitaries stands guard in a foxhole near the frontline village of Shar'iah, on the outskirts of Tal Afar west of Mosul, where Iraqi forces are preparing for the offensive retake the western side of Mosul from Islamic State group fighters, on Feb. 17, 2017.

A fighter of the Hashed al-Shaabi (Popular Mobilisation) paramilitaries poses for a picture carrying a Kalashnikov assault rifle next to an Iraqi flag at a defensive position near the frontline village of Ayn al-Hisan, on the outskirts of Tal Afar west of Mosul, where Iraqi forces are preparing for the offensive retake the western side of Mosul from Islamic State group fighters, on Feb. 18, 2017.

Fighters of the Hashed al-Shaabi (Popular Mobilisation) paramilitaries prepare defensive positions near the frontline village of Ayn al-Hisan.

Fighters of the Hashed al-Shaabi (Popular Mobilisation) paramilitaries prepare ammunition at a defensive position near the frontline village of Ayn al-Hisan.

Fighters of the Hashed al-Shaabi (Popular Mobilisation) paramilitaries prepare defensive positions near the village of Ayn al-Hisan.

Iraq's special forces troops walk past a tank as they prepare for the next stage in the battle for Mosul, in Eastern Mosul, Iraq on Jan. 29, 2017.

Sunni tribal fighters supported by Iraqi security forces stand guard on the eastern side of Mosul on Jan. 30, 2017.

A volunteer begins to paint over a mural that had been displayed by the Islamic State group, on the eastern side of Mosul on Jan. 30, 2017.

Iraq's special forces troops inspect missiles found in a warehouse in the eastern side of Mosul on Jan. 28, 2017. An Iraqi officer says Iraqi forces discovered a mustard chemical warfare agent in Mosul alongside a cache of Russian surface-to-surface missiles.

Iraqi Army troops prepare for the next stage in battle against Islamic State militants, in Mosul on Jan. 30, 2017.

A soldier with Iraq's special forces stands near a confiscated truck left behind by Islamic State militants, on the eastern side of Mosul, Iraq on Jan. 29, 2017.

Iraqi Army soldiers stand guard in a police station destroyed by Islamic State militants in recently liberated neighborhoods from the militants in the eastern Mosul, Iraq, on Jan. 25, 2017.

Shiite fighters of the Popular Mobilization Forces patrol in recently liberated neighborhoods from Islamic State militants in the eastern Mosul.

Iraqi army soldiers inspect a mock vehicle left behind by Islamic State militants, in the eastern side of Mosul.

An Iraqi flag waves over a confiscated truck left behind by Islamic State militants in the eastern side of Mosul, Iraq, on Jan. 24, 2017.

Iraqi Army soldiers deploy after defeating Islamic State militants in the eastern side of Mosul, Iraq, on Jan. 24, 2017. The United Nations and several aid organizations say an estimated 750,000 civilians are still living under Islamic State rule in Mosul despite recent advances by Iraqi forces, and Iraq's prime minister on Tuesday declared eastern Mosul "fully liberated" from Islamic State militants.

Iraqi Army soldiers walk past abandoned bedding, in the eastern side of Mosul on Jan. 24, 2017.

An Iraqi soldier scans the area in a neighborhood recently liberated from Islamic State militants in the eastern side of Mosul on Jan. 24, 2017.

Members of the Iraqi Shiite militia, Imam Ali Brigades, carry the coffin of a comrade who was killed in clashes with Islamic State fighters in eastern Mosul, Iraq, during a funeral procession in Najaf, southern Iraq on Jan. 23, 2017. Iraqi Defense Ministry announced that the Iraqi army gained the full control over the entire eastern side of Mosul after routing the Islamic State following three months of fighting.

An Iraqi army T-72 tank heads to the frontline during a battle against the Islamic State near the Fourth Bridge over the Tigris River.

An Iraqi army soldier takes position during a battle against the Islamic State near a site over the Tigris River in Mosul.

Iraqi security force advance during the fight against the Islamic State militia in the eastern side of Mosul, Iraq.

An Iraqi soldier scans the area held by Islamic state militants from a roof in the eastern side of Mosul.

Iraqi security forces advance during the fight against Islamic State militia in the eastern side of Mosul.

Iraqi security forces fight against Islamic State militia.

Iraqi security force fight against Islamic State militia on the roof of a house in Mosul, Iraq.

Iraqi soldiers gather for tea offered to them by residents of a neighborhood recently liberated from Islamic State militants.

Iraqi forces stand next to weapons reportedly belonging to Islamic State jihadists next to Al-Salam hospital after recapturing the area on Jan. 9, 2017, during an ongoing military operation to retake Mosul. Iraqi forces will retake east Mosul from the jihadists within days, a top commander said, after his fighters in the city reached the Tigris River for the first time.

Iraqi forces members gather next to Al-Salam hospital after recapturing the area from Islamic State group jihadists during an ongoing military operation against the militants.

An Iraqi forces member patrols a street in Mosul next to Al-Salam hospital.

A member of the Iraqi special forces Counter Terrorism Service patrols a street with an armoured vehicle in Mosul's Al-Zahraa neighbourhood on January 7, 2017 during an ongoing military operation against the Islamic State group. Iraqi forces battling the Islamic State group in Mosul are approaching the Tigris River, which runs through the centre of the city, the spokesman for the Counter-Terrorism Service said. / AFP PHOTO / Dimitar DILKOFFDIMITAR DILKOFF/AFP/Getty Images ORIG FILE ID: AFP_JO8OY

An Iraqi special forces Counter Terrorism Service member screams during a battle against Islamic State group jihadists in Mosul's al-Rifaq neighborhood on January 8, 2017, as an ongoing military operation against the militants continues.

An Iraqi special forces Counter Terrorism Service member shoots at a drone flown by Islamic State group jihadists.

An Iraqi special forces Counter Terrorism Service member loads his machine gun during a battle against Islamic State.

Smoke rises as Iraqi federal police detonate unexploded bombs set by Islamic State militants in the eastern side of Mosul, Iraq on Jan. 8, 2017.

A member of the Iraqi Rapid Response Division holds his weapon as he walks near the frontline at the northern edge of al-Mithaq neighborhood in southeastern Mosul, on January 4, 2017. Iraqi forces have retaken more than 60 percent of eastern Mosul from the Islamic State group since the battle for the city began in mid-October. / AFP PHOTO / Ahmad MOUSAAHMAD MOUSA/AFP/Getty Images ORIG FILE ID: AFP_JL6DM

A member of the Iraqi Rapid Response Division plays a small guitar near the frontline at the northern edge of al-Mithaq neighborhood in southeastern Mosul.

An Iraqi army helicopter fires towards Islamic State group target, as it flies over the western edge of Al-Intisar.

Iraqi security forces arrest a suspected fighter with the Islamic State group during a military operation to regain control of the eastern side of Mosul, Iraq.

French soldiers are silhouetted while French President Francois Hollande visits a military outpost on the outskirts of the northern city of Mosul, on Jan. 2, 2017. Western support for military action against Islamic State jihadists is key to preventing attacks at home, Hollande said in Iraq, where yet another bombing killed dozens.

French President Francois Hollande and French Defence minister Jean-Yves Le Drian, right, look at Islamic State-held territory as they visit a military outpost on the outskirts of the northern city of Mosul, on January 2, 2017. Western support for military action against Islamic State jihadists is key to preventing attacks at home, French President Francois Hollande said in Iraq, where yet another bombing killed dozens.

Iraqi special forces patrol the Al-Quds neighborhood after recapturing it from Islamic State group jihadists, on Jan. 3, 2017, during an ongoing operation to retake the city of Mosul. Iraqi forces advanced after declaring a new phase in their offensive on eastern Mosul, stepping up efforts to reclaim the Islamic State's last major stronghold in the country.

Members of Iraq's elite Rapid Response Division take position as they look for a suspected car bomb while advancing in Mosul's southeastern Al-Mithaq neighborhood during an ongoing military operation against Islamic State jihadists on Jan. 3, 2017.

Iraqi security forces arrest a suspected fighter with the Islamic State group during a military operation to regain control of the eastern side of Mosul, Iraq, on Jan. 4, 2017.

Iraqi forces patrol the Al-Intisar area in eastern Mosul after recapturing it in an ongoing military operation against Islamic State jihadists on Jan. 1, 2017. Iraqi forces have retaken more than 60% of eastern Mosul from the Islamic State group since the battle for the city began in mid-October, a top commander said.

Members of the Iraqi special forces advance in Mosul's eastern al-Karamah neighborhood on Jan. 2, 2017, during an ongoing military operation against Islamic State group jihadists.

Members of the Iraqi special forces advance in Mosul's eastern al-Karamah neighborhood.

Members of the Iraqi special forces clear a building as they advance in Mosul.

Members of the Iraqi special forces pose for a photo with an Islamic State group flag as they advance in Mosul's eastern al-Karamah neighborhood.

Members of the Iraqi special forces pass a crater caused by shelling.

Members of the Iraqi special forces advance in Mosul.

Iraqi children look on as members of the Iraqi special forces advance in Mosul's eastern al-Karamah neighborhood .

Iraqi forces detain a man suspected of belonging to the Islamic State in the Al-Intisar area in eastern Mosul after recapturing it in an ongoing military operation against the jihadists on Jan. 1, 2017.

Members of the Iraqi special forces advance in Mosul's eastern al-Karamah neighborhood during an ongoing military operation against the Islamic State.

A member of the Iraqi forces patrols in Mosul's eastern Al-Intisar neighborhood on December 30, 2016, during an ongoing military operation against Islamic State group jihadists.

Iraqi forces launch a rocket in Mosul's eastern Al-Intisar neighborhood. Iraqi forces advanced after declaring a new phase in their offensive on eastern Mosul, stepping up efforts to reclaim the Islamic State group's last major stronghold in the country.

An Iraqi forces member prepares to fire towards Islamic State group targets.

Iraqi forces run for cover as they advance in Mosul's eastern Al-Intisar area.

Iraqi forces fire towards Islamic State group targets in Mosul.

Iraqi forces inspect explosives belonging to Islamic State fighters in Mosul.

A member of the Iraqi forces fires a gun.

Members of the Iraqi forces gather in Mosul.

An Iraqi forces member aims a gun towards Islamic State targets.

Iraqi forces advance in Mosul's eastern Al-Intisar neighborhood during an ongoing military operation against Islamic State.

Iraqi Army soldiers inspect defenses in the eastern section of Mosul, Iraq. Iraq's special forces are continuing to push back Islamic State militants in the eastern sector of Mosul.

A member of the Iraqi pro-government forces check as building in Mosul's southeastern Sumer neighborhood on December 29, 2016, during an ongoing military operation against Islamic State group jihadists. Iraqi forces advanced after declaring a new phase in their offensive on eastern Mosul, stepping up efforts to reclaim the Islamic State group's last major stronghold in the country.

A member of the Iraqi pro-government forces check as building in Mosul's southeastern Sumer neighborhood.

Iraqi pro-government forces advance in Mosul's southeastern Sumer neighborhood.

Iraqi forces advanced after declaring a new phase in their offensive on eastern Mosul, stepping up efforts to reclaim the Islamic State group's last major stronghold in the country.

Iraqi pro-government forces advance in Mosul.

Iraqi forces advanced after declaring a new phase in their offensive on eastern Mosul, stepping up efforts to reclaim the Islamic State group's last major stronghold in the country.

Iraqi pro-government forces advance in Mosul's southeastern Sumer neighborhood.

Iraqi forces advanced after declaring a new phase in their offensive on eastern Mosul.

A member of the Iraqi Federal Police takes a selfie in front of U.S Army personnel while attending Christmas Day mass at Mar Hanna church in Qaraqosh on December 25, 2016 in Mosul, Iraq. The predominantly Christian towns of Bartella and Qaraqosh on the outskirts of Mosul were recently liberated from ISIL as part of the Mosul offensive. The towns were heavily damaged and churches burned and defaced while under ISIL control. Christian communities around Mosul are celebrating Christmas Day as the Mosul offensive continues.

A soldier from the NPU (Nineveh Plain Protection Units) holds a candle while attending Christmas Day mass at Mar Hanna church in Qaraqosh on December 25, 2016 in Mosul, Iraq. The predominantly Christian towns of Bartella and Qaraqosh on the outskirts of Mosul were recently liberated from ISIL as part of the Mosul offensive. The towns were heavily damaged and churches burned and defaced while under ISIL control. Christian communities around Mosul are celebrating Christmas Day as the Mosul offensive continues.

A soldier from the Iraqi Federal police stands guard outside the Mar Hanna church during Christmas day mass in Qaraqosh on December 25, 2016 in Mosul, Iraq.

Christian militia fighters from the Nineveh Plain Protection Units drive a pick-up truck in Qaraqosh transporting four men, allegedly members of the Islamic State group that were found inside a tunnel in Mosul, on December 20, 2016.

Christian militia fighters from the Nineveh Plain Protection Units decorate a Christmas tree on a main street in Qaraqosh, Iraq.

A Christian militia fighter from the Nineveh Plain Protection Units pushes a trolley carrying a rocket and some other items in a street in Qaraqosh.

A sniper of the Iraqi Special Forces scans for target from his position in Mishraq district in Mosul, Iraq. Advancing into Mosul has become a painful slog for Iraqi forces. Islamic State group militants have fortified each neighborhood, unlike past battles where they concentrated their defenses in one part of the city.

A member of the Iraqi Special Forces shoots his machine gun against an Islamic State militant drone on Dec. 18, 2016, in the al-Barid district in Mosul, Iraq.

A Member of the Iraqi Special Forces stands in the stairs of a house at the frontline in Mishraq district in Mosul, Iraq.

Iraqi members of the Special Forces scan the area held by Islamic state militants from a roof in Mishraq district in Mosul, Iraq. Advancing into Mosul has become a painful slog for Iraqi forces. Islamic State group militants have fortified each neighborhood, unlike past battles where they concentrated their defenses in one part of the city.

Iraqi special forces gather next to their armored vehicles in the neighborhood of al-Barid, east of Mosul, on December 18, 2016 during their ongoing operation against Islamic State group jihadists to wrest back the city.

A member of Iraqi special forces kisses a child in the neighborhood of al-Barid east of Mosul.

Iraqi special forces gather next to their armored vehicles in the al-Barid area, east of Mosul.

Members of the Iraqi Special Forces scan for Islamic State militants from a house in Al Barid district in Mosul, Iraq.

Shiite fighters from the Hashed al-Shaabi paramilitary units advance towards the village of Shwah, south of the city of Tal Afar on the western outskirts of Mosul, on Dec. 13, 2016, during an ongoing operation against Islamic State group jihadists. Hashed al-Shaabi paramilitary forces said they retook three more villages southwest of Mosul, completing another phase in operations aimed at cutting the jihadists' link to Syria.

A Shiite fighters from the Hashed al-Shaabi paramilitary units sits next to weapons as they enter the village of Shwah, south of the city of Tal Afar on the western outskirts of Mosul.

Shiite fighters from the Hashed al-Shaabi paramilitary units advance towards the village of Shwah, south of the city of Tal Afar on the western outskirts of Mosul.

Shiite fighters from the Hashed al-Shaabi paramilitary units dance and flash the sign for victory after entering the village of Shwah, south of the city of Tal Afar on the western outskirts of Mosul.

Shiite fighters from the Hashed al-Shaabi paramilitary units advance towards the village of Shwah.

Iraqi army soldiers advance through rain towards Mosul, in the eastern Samah neighborhood, of Mosul, Iraq. Iraqi forces met stiff resistance in Mosul, including waves of suicide car bombs, since launching an offensive to retake the city in October. They have retaken less than a quarter of the city since the operation began.

Shiite fighters from the Hashed al-Shaabi paramilitary forces fire toward an enemy position as they advance to the Iraqi town of Shwah. The fighting is part of an ongoing operation against Islamic State group jihadists. The Hashed al-Shaabi forces have been fighting on a western front, in a campaign aimed at retaking the town of Tal Afar and cutting IS supply lines between Mosul and Syria.

Shiite fighters from the Hashed al-Shaabi paramilitary forces advance toward the Iraqi town of Shwah, west of Mosul, during an ongoing operation against Islamic State jihadists.

Shiite fighters advance toward Shwah.

Hashed al-Shaabi paramilitary forces approach the town of Jamaat Hussein.

A Shiite paramilitary fighter rests as the forces advance toward Mosul.

An Iraqi soldier fires a canon toward the Islamic State-held village of Ganus from an artillery position in the village of Hajj Ali, around 44 miles south of Mosul.

Iraqi soldiers of the 17th Division carry a wounded comrade after a mortar fell in an area where the troops where gathering to advance towards the Islamic State group held village of Ganus, around 70 km, 44 miles, south of Mosul, Iraq.

Iraqi Shiite fighters from the Hashed al-Shaabi paramilitaries prepare ammunition from their position in the village of Abu Shuwaihi, southwest of Mosul, before firing towards Islamic State group's jihadists in Tall Zalat, on December 3, 2016 during their ongoing operation to retake Mosul. Forces from the Iraqi army retook four villages from the Islamic State northeast of the city of Mosul, the Joint Operations Command said. The recapture by the army's 16th division of the villages between Bashiqa and Mosul clears the way for Iraqi forces to enter the city from the northeast.

Iraqi Shiite fighters from the Hashed al-Shaabi paramilitaries prepare to fire missiles from their position in the village of Abu Shuwaihi, southwest of Mosul.

Shiite fighters from the Hashed al-Shaabi line up to receive food from volunteers who cook for pro government forces in the village of Ayn al-Baidha, near Ayn an Nasr, south of Mosul.

A Shiite fighter from the Hashed al-Shaabi flashes the sign for victory as he sits inside a heavily armed military vehicle near the village of Ayn Nasir.

Shiite fighters from the Hashed al-Shaabi drive near the village of Ayn Nasir, south of Mosul, on December 4, 2016, during the ongoing operation against Islamic State group jihadists.

An Iraqi Army soldier fights Islamic State militants on the front line, in the Shaimaa neighborhood of Mosul, Iraq Dec. 4, 2016.

An Iraqi Army soldier takes cover on a rooftop during fighting with Islamic State militants on the front line, in the Shaimaa neighborhood of Mosul, Iraq, Dec. 4, 2016.

Iraqi forces members fire a D30 122mm gun in the village of Abu Saif south of Mosul, as weather temperatures continue to drop, on December 1, 2016. Tens of thousands of Iraqi troops and allied forces launched an offensive last month to retake Mosul, which was seized by IS more than two years ago.

Iraqi forces members clean a M109 155mm self-propelled howitzer in the village of Arabat, south of Mosul.

Iraqi forces members advance in the village of Arabat, south of Mosul.

Iraqi forces members gather to warm up around a fire in the village of Arabat.

An Iraqi forces member flashes his gun as he waves his national flag in the village of Arabat.

A damaged house after fight between Iraqi security forces and Islamic State militants at Hamdaniyah near the northern city of Mosul.

Iraqi Army soldiers secure streets in a recently liberated village occupied by Islamic State militants outside Mosul.

An Iraqi Army soldier takes position as security forces search houses for Islamic State militants at a recently liberated village outside Mosul.

Iraqi Army soldiers search a house for Islamic State militant in a village recently liberated outside Mosul, Iraq.

An Iraqi Army soldier rides a bicycle as he patrols at a recently liberated village for Islamic State militants outside Mosul.

Shiite fighters from the Hashed al-Shaabi hold a position in the village of Baylunah, southwest of Mosul, on November 27, 2016, during an ongoing operation against Islamic State group jihadists. More than 70,000 people have been displaced in the Mosul area since Iraqi forces launched a major offensive to retake the IS bastion on October 17.

Shiite fighters from the Hashed al-Shaabi inspect the belongings of a house in the village of Baylunah, southwest of Mosul.

An Iraqi special forces member holds a position in an armored vehicle in a recently recaptured district of southeast Mosul.

An Iraqi soldier maneuvers an armored vehicle in a recently recaptured district of southeast Mosul.

Iraqi Special Forces parade with Staff Lieutenant General Abdul Ghani Al-Asadi, commander of the Counter-Terrorism Service in a recently recaptured district of southeast Mosul.

Iraqi men mourn over the coffin of a fighter from the Hashed al-Shaabi paramilitaries, who was killed in battles against Islamic State group jihadists in the town of Tal Afar, during his funeral in the southern city of Basra.

An alleged Islamic State group collaborator who was captured by the Iraqi forces sits inside a military humvee, in the Samah front line neighborhood, in Mosul.

Members of Iraqi special forces hold a flag of the Islamic State group after they gained control of the recently recaptured district of Shoqaq Khadraa, eastern Mosul.

Members of the Iraqi Special Forces fire towards a position of the Islamic State group from a rooftop in a northeastern district of the Iraqi city of Mosul on November 24, 2016. Elite forces gained new ground in east Mosul, looking for fresh momentum as stiffer-than-expected IS resistance threatened to bog down the five-week-old offensive against the jihadists' last major stronghold in Iraq.

A member of the Iraqi Special Forces is seen behind the reinforced windshield of an Iraqi Special Forces armored vehicle, bearing the bullet marks, in a street of a district of Northeastern Mosul.

A member of the Iraqi Special Forces wears a skull mask while standing guard in a northeastern district of the city of Mosul.

Iraqi Special Forces advance as Islamic State group fighters clash with government forces in Mosul.

An Iraqi special forces soldier leads an alleged Islamic State group collaborator to inside a house where they gather people to transfer them to refugee camps, in the Samah front line neighborhood in Mosul, Iraq.

Members of the Iraqi Christian forces Kataeb Babylon walk in the courtyard of the Mar Benham Syriac Catholic monastery, which have been defaced by Islamic State group jihadists with various graffiti in the town of Khidr Ilyas, southeast of Mosul, on November 22, 2016. Iraqi fighters battling to oust the Islamic State group from Mosul captured the Catholic Mar Benham monastery on November 20, allowing its priests to return. Dating back to the fourth century AD, the monastery lies just 30 kilometres south of Iraq's second city which became a bastion of the jihadist group which swept across northern Iraq in 2014.

A member of the Iraqi Christian forces Kataeb Babylon, holds a Kalashnikov assault rifle as he poses at the Mar Benham Syriac Catholic monastery in the town of Khidr Ilyas, southeast of Mosul, on November 22, 2016.

Members of the Iraqi Christian forces Kataeb Babylon detain blindfolded suspected Islamic State group jihadists at the Mar Benham Syriac Catholic monastery in the town of Khidr Ilyas, southeast of Mosul, on November 22, 2016.

Soldiers from the Iraqi Special Forces take a selfie on a street in the Aden district of Mosul after troops almost entirely retook the area from Islamic State group jihadists on November 22, 2016.

US soldiers are seen next to their armoured vehicles near an Iraqi army base on the outskirts of Mosul, on November 23, 2016.

Iraqi army soldiers hold a flag from the Islamic State jihadist group up-side-down on November 23, 2016, near an Iraqi army base in the outskirts of Mosul.

An Iraqi army tank advances towards Qara Tappa, during fighting between Iraqi forces and Islamic State militants southeast of Mosul, Iraq, Nov. 23, 2016.

Aden district residents of Mosul are seen through the bullet-riddled windshield of an Iraqi Special Forces armored vehicle.

Soldiers from the Iraqi Special Forces look at the screen of a tablet as they fly a small drone from a roof to search for Islamic State group fighters hiding themselves in the Aden district of Mosul as they secure the area on November 22, 2016.The fighting inside the city so far has focused on eastern neighborhoods, which elite counter-terrorism and army forces entered earlier this month. The Islamic State group has offered fierce resistance to defend its last remaining bastion in Iraq, the city where its leader Abu Bakr al-Baghdadi proclaimed a caliphate in June 2014.

An Iraqi man and his daughter gesture to soldiers from the Iraqi Special Forces patrolling a street in the Aden district of Mosul after troops almost entirely retook the area.

Soldiers from the Iraqi Special Forces patrol a street in the Aden district of Mosul.

Iraqi soldiers from the ninth armored brigade take part in military operation in the al-Shimaa district, southeast of Mosul.

Iraqi soldiers from the ninth armored brigade inspects the locations of Islamic state fighters inside Mosul city.

Iraqi soldiers from the ninth armored brigade take part in military operation in the al-Shimaa district, southeast of Mosul.

A member of the Iraqi Federal Police fires his weapon at an Islamic State group target on the front line near the village of Tall Adh-Dhahab, some 6 miles south of Mosul, on Nov. 18, during a massive operation to oust Islamic State jihadists from the country's second city.

The sun cuts through the smoke as an Iraqi soldier walks among burning oil wells set ablaze by retreating Islamic State jihadists in the town of Qayyarah, Iraq, on Sunday.

An Iraqi soldier guards the perimeter as firefighters and engineers work to put out the fire in an oil well, set ablaze by retreating Islamic State group's jihadists in Qayyarah, Iraq.

Popular Mobilization Units fighters talk on the radio as they watch Islamic State positions in the airport of Tal Afar, west of Mosul, Iraq.

An Iraqi special forces soldier patrols at al-Tahrir neighborhood in Mosul.

Members of Iraqi Shiite Badr Army militia react on their way to take part in a military operation near Tal Afar military airport some 25 miles west of Mosul.

A car bomb explodes next to Iraqi Special Forces armored vehicles as they advance towards Islamic State held territory in Mosul, Iraq, Nov. 16, 2016. Troops have established a foothold in the city's east from where they are driving northward into the Tahrir neighborhood. The families in Tahrir are leaving their homes to flee the fighting.

A commander from the Iraqi Special Forces 2nd division calls his men back to a previous position as they come under fire from IS fighters while pushing into the Aden neighborhood in Mosul.

Soldiers from the Iraqi Special Forces 2nd division use a wall as cover as a suspected IS fighter targets their roof top position while pushing into the Aden neighborhood in Mosul.

A soldier from the Iraqi Special Forces 2nd division prays during a lull in the fighting with IS fighters while pushing into the Aden area of Mosul.

Soldiers from the Iraqi Special Forces 2nd division have a cup of tea offered by a resident during a lull in the fighting with IS fighters while pushing into Mosul.

A soldier from the Iraqi Special Forces 2nd division rests during a lull in the fighting with IS fighters while pushing into Mosul.

Children emerge from their houses to greet soldier from the Iraqi Special Forces 2nd division during a lull in the fighting with IS fighters while pushing into the Aden neighborhood in Mosul.

A suspected Islamic State member is guarded by a soldier from the Iraqi Special Forces 2nd division.

Soldiers from the Iraqi Special Forces 2nd division run for cover under fire from IS fighters as they push into Mosul.

An Iraqi special forces fighter warms himself before an operation to advance towards Islamic State militant-held territory in Mosul.

Spent bullet casings sit on a sidewalk as Iraqi special forces advance towards Islamic State militant-held territory in Mosul, Iraq.

Iraqi special forces advance towards Islamic State militant-held territory in Mosul.

Frontline medics help carry an Iraqi soldier hit by sniper fire in his pelvis area out of their vehicle at an Iraqi Special Forces 2nd division outdoor field clinic in the Samah neighborhood of Mosul on November 15, 2016.

A soldier from the Iraqi Special Forces 2nd division wipes a comrade's forehead after removing shrapnel from his upper body at an outdoor field clinic in the Samah neighborhood of Mosul.

A soldier from the Ninth Armored Division, 109th artillery battalion, covers his ears after a 155mm shell was fired towards an Islamic State militant position in Mosul, from the village of Ali Rash.

An Iraqi special forces sniper aims his weapon at Islamic State positions near the front line, in eastern Mosul.

An Iraqi special forces fighter looks at Islamic State positions through a periscope near the front line in eastern Mosul.

An Iraqi special forces fighter listens to the radio as he watches Islamic State positions near the front line, in eastern Mosul.

An Iraqi special forces fighter moves between buildings near the front line during fighting with Islamic State militants, in eastern Mosul.

Soldiers from the Iraqi Army Armored Ninth Division eat lunch in a house across from the frontline with ISIL in the Entisar area of Mosul.

Soldiers from the Iraqi Army Armored Ninth Division take cover as a sniper fires at ISIL positions from a rooftop across the frontline in the Entisar neighborhood in Mosul.

Soldiers from the Iraqi Special Forces 2nd division react as they are given orders that a reported suicide bomb vehicle is moving towards their position as they engage with Islamic State group fighters in Mosul's Karkukli neighborhood on November 14, 2016.

A soldier from the Iraqi Special Forces 2nd division secures a building as they claimed another block while engaging with Islamic State group fighters in Mosul's Karkukli area.

Soldiers from the Iraqi Special Forces 2nd division rest during a lull in the fighting against Islamic State jihadists.

A front line drone operator from the Iraqi Special Forces 2nd division takes cover behind a rooftop wall as he eyes his aircraft while smoke billows from a Islamic State group position that was hit during fighting in Mosul's Karkukli neighborhood.

A soldier from the Iraqi Special Forces 2nd division carrying an anti tank missile takes up a position to prepare for a suicide bomb vehicle that was reported to be moving towards their position.

Iraqi army soldiers fire mortars against the Islamic State militants, at Shahrazad village 2 miles east of Mosul, Iraq.

The father and grandfather of 15-year-old Shafiq mourn as Iraqi forces surround his body at an outdoor field clinic in the Samah neighborhood in Mosul on Nov. 13, 2016. A double barreled mortar attack killed Shafiq and seriously injured his 12-year-old neighbor Mohammed as Iraqi Special Forces 2nd division continued to battle ISIL forces as they pushed through the Arbagiah area and into the neigborhood of Karkukli.

Foreign volunteers treat 12-year-old Mohammed at an outdoor field clinic in the Samah neighborhood in Mosul on Nov.13, 2016, after he was hit in a double barreled mortar attack seriously injuring Mohammed and killing his 15-year-old neighbor Shafiq.

A Iraqi special forces fighter walks with his rifle during flighting with Islamic State militants in eastern Mosul, Iraq, Sunday, Nov. 13, 2016.

An Iraqi Special Forces 2nd division soldier prays next to a Humvee military vehicle before they pushed forward in the Karkukli neighborhood of Mosul during the ongoing operation to retake the city from Islamic State, Nov. 13, 2016.

Women and children react as a helicopter strafes nearby buildings while they wait to receive a food package distributed by the Iraqi Army Armored Ninth Division in a street behind the frontline in the Intisar neighborhood on Nov. 13, 2016 in Mosul, Iraq.

A young boy plays with a toy as residents line up to receive food packages in a street just behind the frontline in the Intisar neighborhood on Nov. 13, 2016 in Mosul, Iraq.

A Christian Iraqi woman cries after she saw the St. Addai church which was damaged by Islamic State fighters during their occupation of Keramlis village, less than 18 miles southeast of Mosul, Iraq, Sunday Nov. 13, 2016. There were gasps, and then tears, at the small church in northern Iraq as a group of Christians returned to their parish to find everything had been destroyed, including the statue of the Virgin Mary which ISIL militants decapitated before they left.

A soldier from the Iraqi Special Forces 2nd division crouches as he takes up a position while his comrades take cover behind a wall on a rooftop as they come under fire from ISIL fighters trying to take a house in the Karkukli neighborhood of Mosul on Nov. 13, 2016.

Iraqi Special Forces 2nd division soldiers come under fire from ISIL while running across an intersection as they try to push forward in the Karkukli neighborhood of Mosul on Nov. 13, 2016.

Peshmerga soldiers fortify their position along a sand berm north of the Iraqi Kurdish checkpoint village of Shaqouli, some 35 kilometres east of Mosul, on November 10, 2016. Since the start of the Mosul offensive the Kurds have moved their border some 10 kms closer to Iraq's second city, marking it out with a line in the sand.

A Peshmerga soldier mans a fortified position along a sand berm north of the Iraqi Kurdish checkpoint village of Shaqouli.

Iraqi shiite fighters from Abbas brigade militia take part in a military operation in western Mosul, Iraq.

A fighter from a local tribe keeps watch from his rooftop outpost under smoke filled skies from burning oil wells set on fire by fleeing ISIS members in Al Qayyarah, Iraq.

A Peshmerga fighter looks for hostiles as he and his team move between buildings in Bashiqa on November 9, 2016. Iraqi Kurdish forces have seized the town of Bashiqa near Mosul from the Islamic State group, an official said, as US-backed militia forces advanced on the jihadists' Syrian stronghold Raqa. Capturing Bashiqa would be a final step in securing the eastern approaches to Mosul, three weeks into an offensive by Iraqi forces to retake the country's second city.

Members of the Iraqi forces watch Donald Trump giving a speech after he won the US president election in the village of Arbid on the southern outskirts of Mosul.

Iraqi forces prepare to fire 120mm mortar shells from an army position in the village of Arbid.

Iraqi forces prepare M109 self-propelled howitzers at an army position in the village of Arbid on the southern outskirts of Mosul.

Iraqi forces operate a 155mm gun on board a M109 self-propelled howitzer at an army position in the village of Arbid.

Iraqi forces prepare 120mm mortar shells at an army position near the village of Arbid.

Iraqi forces drive their vehicle near the village of Arbid on the southern outskirts of Mosul.

Iraqi forces receive fruit on a road near in the village of Arbid.

Iraqi forces drive their vehicle near the village of Arbid.

Firefighters work at the site of an oil well fire in Qayara, some 31 miles south of Mosul, Iraq.

U.S. Marines install equipment at Qayara West Coalition base in Qayara, some 50 kilometers south of Mosul.

U.S. Army soldiers move through Qayara West Coalition base in Qayara.

A Peshmerga soldier returns fire as his convoy drives through an area exposed to a sniper on November 8, 2016, as the Iraqi Kurdish forces pushed deeper into the town of Bashiqa during street battles against Islamic State group jihadists. Iraqi Kurdish forces have seized the town of Bashiqa near Mosul from the Islamic State group, an official said, as US-backed militia forces advanced on the jihadists' Syrian stronghold Raqa. Capturing Bashiqa would be one of the final steps in securing the eastern approaches to Mosul, three weeks into an offensive by Iraqi forces to retake the country's second city.

Peshmerga fighters run for cover across a section exposed to sniper fire as the forces pushed deeper into the town of Bashiqa.

A Peshmerga fighter runs to take position as the Iraqi Kurdish forces pushed deeper into the town of Bashiqa.

Smoke billows following an airstrike while Peshmerga fighters take a break on a roof in Bashiqa.

A Peshmerga fighter sits on a pick up truck in Bashiqa.

A plume of smoke is seen in Bashiqa.

A member of the Iraqi forces flashes sign for victory in the Hamam al-Alil area.

Iraqi forces wait with their tanks in the Hamam al-Alil area.

A Kurdish Peshmerga fighter looks at Islamic State positions during heavy fighting in Bashiqa, east of Mosul.

A man cries as he greets soldier from the Iraqi army's 9th armored division moving into the Al-Intissar neighborhood of Mosul on Nov. 7, 2016, during an operation against Islamic State group jihadists to regain control of the city.

Local residents offer water to a soldier from the Iraqi army's 9th armored division as troops moved further into the Al-Intissar neighborhood of Mosul.

A soldier from the Iraqi army's 9th armored division kisses a young girl as residents come to greet troops in the Al-Intissar neighborhood of Mosul.

The shoes of a killed Islamic State group fighter lie in front of a wall riddled with shrapnel and bullets in the Al-Intissar neighborhood of Mosul.

Soldiers from the Iraqi army 9th armored division wait at a base adjacent to the Al-Intissar neighborhood of Mosul.

Soldiers of the Iraqi army display mortar shells confiscated from Islamic State group in the town of al-Hamdaniyah, 19 miles east of Mosul.

Iraqis inspect damage at a site in the Hamam al-Alil area, near the southern outskirts of Mosul.

Iraqi forces patrol the Hamam al-Alil area near Mosul after recapturing it from Islamic State.

Iraqi forces take a selfie with children as they patrol the Hamam al-Alil area.

Iraqi army soldiers fire an artillery round at Islamic State positions in Bartilla, about 9 miles east of Mosul, Iraq. As Iraqi forces struggle to solidify gains in neighborhoods in eastern Mosul, more and more civilians are fleeing the city.

Peshmerga fighters buy snacks from a makeshift store at a checkpoint on the road to the frontline near Gogjali, Iraq.

Iraqi children, one flashing the sign of victory, greet Iraqi army's soldiers from the 9th armored division in the area of Ali Rash, adjacent to the eastern Al-Intissar neighborhood of Mosul.

An Iraqi army officer from the 9th armored division gives coordinates on the radio from his position in the settlement of Ali Rash.

An Iraqi army soldier from the 9th armored division cleans his machine gun with a brush in the area of Ali Rash.

An Iraqi army soldier from the 9th armored division prepares mortars to be fired.

Mourners carry the coffin of an Iraqi soldier, who has been killed in the ongoing military operation to retake the city of Mosul from the Islamic State.

An Iraqi army sniper from the 9th armored division walks to take his position in the area of Ali Rash.

Dust rises as a tank from the Iraqi army's 9th armored division fires at a suspect car approaching their position in the area of Ali Rash.

An Iranian Kurdish member of the Freedom Party of Kurdistan (PAK) holds a position in an area near the town of Bashiqa.

Iranian Kurdish members of the Freedom Party of Kurdistan (PAK) hold a position on in an area near the town of Bashiqa.

An Iraqi Kurdish Peshmerga fighter, next to a Kurdish flag, holds a position in Sheikh Ali village near the town of Bashiqa.

A man carrying a white flag talks to an Iraqi special forces soldier in Gogjali, on the eastern edges of Mosul, Iraq.

An Iraqi army soldier sits atop an armored vehicle on the outskirts of Hamam al-Alil, south of Mosul, Iraq,.

An Iraqi army soldier stands at the back of a pickup truck next to a burning oil field in Qayara, south of Mosul, Iraq, on Nov. 3, 2016.

An Iraqi special forces soldier puts up a helmet as a decoy as a sniper gets ready to fire on Islamic State positions in Gogjali, on the eastern edges of Mosul, Iraq.

Sunni tribal militiamen ride past a checkpoint in Qayara, south of Mosul, Iraq.

An Iraqi special forces soldier sits on a rooftop in Gogjali, an eastern district of Mosul.

U.S. forces patrol an area after the Iraqi forces gained control of the recently recaptured village of Kokjali near Mosul.

Iraqi soldiers pose with an Islamic State group flag as they hold a position in the village of Gogjali, a few hundred yards from Mosul's eastern edge, on Nov. 2, 2016, as clashes continue between Iraqi army forces and the jihadists to retake Mosul, the last Iraqi city under the control of ISIL.

An Iraqi soldier takes position in Gogjali. More than a million civilians in Mosul were in grave danger and aid workers were "bracing for the worst," a relief group said, after Iraqi forces reached the jihadist-held city.

Iraqi mourners proceed in a funeral procession for Shiite fighters who were killed in the Iraqi army offensive to retake the northern city of Mosul from the Islamic State group, in the holy Iraqi city of Najaf.

A man kisses an Iraqi special forces soldier after his house was searched, in Gogjali, an eastern district of Mosul, Iraq.

An Iraqi special forces soldier peeks through a hole in a door as his unit gets ready to search a compound in Gogjali, an eastern district of Mosul, Iraq.

Iraqi special forces soldiers try to repair their vehicle as their unit is attacked by Islamic State snipers in Gogjali.

Kurdish peshmerga soldiers look at an Islamic State flag inside an abandoned house in Faziliya, north of Mosul, Iraq.

A Kurdish peshmerga soldier observes Islamic State-held territory through binoculars at a front-line position near Khorsabad, north of Mosul, Iraq.

Iraqi special forces soldiers patrol a street in Gogjali, an eastern district of Mosul, Iraq.

An Iraqi special forces soldier climbs up the stairs of a house as his unit searches for an Islamic State sniper position in Gogjali.

Shiite fighters from the Hashed al-Shaabi enter the village of Abu Shuwayhah, south of jihadist-held Mosul, on November 1, 2016, during the ongoing operation to retake the last major Islamic State group stronghold in Iraq. Just over two weeks into the massive offensive to retake Mosul soldiers managed to push within city limits.

Iraqi forces advance towards the village of Abu Shuwayhah, south of Mosul during the ongoing operation to retake the last major Islamic State group stronghold in Iraq.

A member of the Iraqi forces looks at Islamic Sate group documents they found in a building in the village of Abu Shuwayhah.

Shiite fighters from the Hashed al-Shaabi enter the village of Abu Shuwayhah, south of jihadist-held Mosul.

Shiite fighters from the Hashed al-Shaabi pray on the outskirts of the village of Abu Shuwayhah.

An Iraqi forces tank advances towards the village of Abu Shuwayhah.

A Iraqi soldier stands near a checkpoint as smoke rises from burning oil fields in Qayara, south of Mosul, Iraq, Nov. 1, 2016. The U.N. human rights office is lauding efforts by the U.S.-led coalition in the battle against the Islamic State group in Mosul. The office in Geneva says coalition flights over Iraq have largely succeeded in preventing IS from bringing in 25,000 more civilians to the city center, where the militant group has been using people as human shields as Iraqi forces advance on Mosul.

Displace people stand on the back of a truck at a checkpoint near Qayara, south of Mosul, Iraq.

Iraqi army soldiers warm themselves next to a fire near the Qayara air base, south of Mosul, Iraq.

Iraqi army soldiers guard the last government controlled checkpoint south of Mosu.

Displaced people who fled from Islamic State-held territory sit outside a mosque guarded by Iraqi soldiers in Shuwayrah.

Iraqi mourners sit next to coffins of soldiers from the Popular Mobilization Forces militia, who were killed in car bombing during operation to liberate Mosul, at the funeral procession in Najaf.

Members of the Iraqi Counter Terrorism Service drive near the village of Bazwaya, on the eastern edges of Mosul, tightening the noose on Mosul as the offensive to retake the Islamic State group stronghold entered its third week on October 31, 2016. An Iraqi colonel said CTS had recaptured Bazwaya, one of two IS-held villages that had been standing between Iraqi forces and the eastern edges of Mosul.

Members of the Iraqi Counter Terrorism Service prepare to attack near the village of Bazwaya, on the eastern edges of Mosul.

Shiite fighters from the Hashed al-Shaabi flash the sign of victory from the back of a truck as they drive towards the village of Umm Sijan.

Shiite fighters from the Hashed al-Shaabi drive their vehicles towards the village of Umm Sijan, south of Mosul.

Shiite fighters from the Hashed al-Shaabi prepare shells to hit Islamic State (group's jihadists' positions as they head to the village of Umm Sijan.

Shiite fighters from the Hashed al-Shaabi inspect a makeshift factory used by Islamic State group's jihadists to manufacture weapons in the village of Imam al-Hamzah, south of Mosul during Iraqi forces' operation to recapture the main hub city from IS.

A Shiite fighter from the Hashed al-Shaabiinspects a makeshift factory used by Islamic State group's jihadists to manufacture weapons in the village of Imam al-Hamzah.

An injured Iraqi Counter Terrorism Section member receives medical treatment following clashes with Islamic State group jihadists near the village of Bazwaya, on the eastern edges of Mosul.

French self-propelled 155 mm/52-calibre gun-howitzer are shown in the Qayyarah base south of Mosul as the French army provides military support for Iraq forces fighting to retake the city of Mosul from the hands of the Islamic State group.

A man rides his bike on a street as smoke rises from burning oil fields in Qayara, some 50 kilometers south of Mosul.

An Iraqi special forces soldier peers out of a Humvee in Bazwaya, some 8 kilometers from the center of Mosul, Iraq.

An Iraqi special forces soldier prays in the village of Bazwaya, some 8 kilometers from the center of Mosul, Iraq.

Shiite fighters from the Hashed al-Shaabi launch missiles on the village of Salmani, south of Mosul, on October 30, 2016 during the ongoing battle against Islamic State group jihadists to liberate the city of Mosul. Iraqi paramilitary forces said they had captured several villages southwest of Mosul from the Islamic State group on Sunday, the second day of an operation to cut the jihadists' supply lines.

An Iraqi forces member stands in the Church of the Immaculate Conception in the town of Qaraqosh, 30 kms east of Mosul, after Iraqi forces recaptured it from Islamic State group jihadists. Iraqi forces are fighting their way toward Mosul to retake it from IS in an operation that is now in its second week, and some Christian villages have already been retaken.

A Shiite fighter from the Hashed al-Shaabi takes aim during an advance towards the village of Salmani, south of Mosul during the ongoing battle against Islamic State group jihadists to liberate the city of Mosul.

A Shiite fighter from the Hashed al-Shaabi fires his weapon as they advance towards the village of Salmani, south of Mosul.

Shiite fighters from the Hashed al-Shaabi advance towards the village of Salmani.

Shiite fighters from the Hashed al-Shaabi advance towards the village of Salmani. Iraqi paramilitary forces said they had captured several villages southwest of Mosul from the Islamic State.

Shiite fighters from the Hashed al-Shaabi advance towards the village of Salmani.

Shiite fighters from the Hashed al-Shaabi advance towards the village of Salmani during the ongoing battle against Islamic State group jihadists to liberate the city of Mosul.

An Iraqi forces tank passes wreckage as it advances towards the village of Salmani.

Shiite fighters from the Hashed al-Shaabi prepare mortars to launch on the village of Salmani, south of Mosul.

An unidentified woman mourns as Iraqis carry a coffin of a soldier, who was killed in the fighting with Islamic State militants in Mosul.

Iraqi forces and the Hashed al-Shaabi (Popular Mobilization) advance toward the village of Ayn Nasir, south of Mosul, during the ongoing battle against Islamic State group jihadists to liberate the city of Mosul.

Iraqi forces and the Hashed al-Shaabi (Popular Mobilization) advance toward the village of Ayn Nasir, south of Mosul, during the ongoing battle against Islamic State group jihadists to liberate the city of Mosul.

An Iraqi forces tank advances toward the village of Ayn Nasir, south of Mosul, during the ongoing battle against Islamic State group jihadists to liberate the city of Mosul.

An Iraqi army soldier fires his rifle in the town of Shura, south of Mosul, Iraq. Iraqi troops approaching Mosul from the south advanced into Shura after a wave of U.S. led airstrikes and artillery fire against Islamic State positions inside the town.

Iraqi pro-government forces advance towards the village of Sin al-Dhuban, south of Mosul, on October 27, 2016, during an operation to retake the main hub city from the Islamic State group jihadists. A US general told AFP that between 800 and 900 Islamic State group fighters have been killed since the Iraqi-led operation to recapture Mosul from the jihadists began.

An Iraqi man waving a white flag sits with his family in a vehicle driving near Sin al-Dhuban village, some 40 kilomtres south of Mosul, after they fled the Hammam al-Alil area.

A member of the Iraqi forces rests on the front line near the village of Sin al-Dhuban, south of Mosul during an operation to retake the main hub city from the Islamic State.

Iraqi Kurdish leader Massud Barzani, center, and Shiite Muslim leader Ammar al-Hakim, second from right, the head of the Islamic Supreme Council of Iraq, arrive to give a joint press conference on the top of Mount Zardak, where Iraqi Kurdish peshmerga fighters hold a position during an operation against the Islamic State.

A family grieves over the grave of a family member at a graveyard damaged by Islamic State extremists in Qayara, some 31 miles south of Mosul.

Newly displaced Iraqis who fled from the city of Mosul, Iraq's last major Islamic State group stronghold, are reunited with their relatives who arrived two years ago at the refugee camp in the Khazer area, near the Kurdish checkpoint of Aksi Kalak, some 25 miles east of Irbil. The United Nations Office for the Coordination of Humanitarian Affairs Stephane Dujarric told reporters that almost 9,000 people are internally displaced as a result of the Mosul military operation in Iraq.

An Iraqi Federal Police vehicle passes through a checkpoint in Qayyara, about 31 miles south of Mosul, Iraq. Islamic State militants have been going door-to-door in farming communities south of Mosul ordering people at gunpoint to follow them north into the city and apparently using them as human shields as they retreat from Iraqi forces. Witnesses to the forced evacuation describe scenes of chaos as hundreds of people were driven north across the Ninevah plains and into the heavily fortified city, where the extremists are believed to be preparing for a climactic showdown.

Iraqi soldiers rest at a checkpoint in Qayyara, about 31 miles south of Mosul, Iraq.

Displaced persons wait for transport at a checkpoint in Qayyara, about 31 miles south of Mosul, Iraq.

Iraqi forces flash the V-sign as they stand on an infantry fighting vehicle loaded on a truck driving through the Al-Shura area, south of Mosul, on Oct. 24, 2016, during an operation to retake the main hub city from the Islamic State group jihadists. Iraqi forces advancing on Mosul faced stiff resistance from the Islamic State group despite the US-led coalition unleashing an unprecedented wave of air strikes to support the week-old offensive. Federal forces and Kurdish peshmerga fighters were moving forward in several areas, AFP correspondents on various fronts said, but the jihadists were hitting back with shelling, sniper fire, suicide car bombs and booby traps.

Iraqi families who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State to retake the city of Mosul, are seen gathering on an area near Qayyarah. The United Nations refugee agency is preparing to receive 150,000 Iraqis fleeing fighting around the Islamic State-held city of Mosul within the next few days, its chief said. / AFP PHOTO / BULENT KILICBULENT KILIC/AFP/Getty Images ORIG FILE ID: AFP_HG1SR

Iraqi women whose families were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State to retake the city of Mosul, are seen gathering on an area near Qayyarah.

Iraqi families, who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State to retake the city of Mosul, receive food near Qayyarah.

An Iraqi man reacts as families, who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State to retake the city of Mosul, wait for food near Qayyarah.

An Iraqi man checks the destruction in the Christian Iraqi town of Bartella, about 10 miles east of Mosul, after Iraqi forces retook control of the town from jihadists of the Islamic State.

Iraqi families, who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State to retake the city of Mosul, walk at a camp for displaced people near Qayyarah.

David Dosha, the priest of the Church of Mart Shmony, located in the Christian Iraqi town of Bartella about 10 miles east of Mosul, inspects the damage at the church's compound.

A member of the Iraqi forces holds a position at the al-Shura area, south of Mosul during an operation to retake the main hub city from the Islamic State jihadists.

Iraq's elite counterterrorism forces prepare to attack Islamic State positions as fighting to retake the extremist-held city of Mosul enters its second week, in the village of Tob Zawa, outside Mosul.

Iraqi government forces wave to civilians as they enter the village of al-Khuwayn, south of Mosul, after recapturing it from Islamic State group jihadists on October 23, 2016, in part of an ongoing operation to tighten the noose around Mosul and reclaim the last major Iraqi city under IS control.

Iraqi forces distribute fruit to children in the village of al-Khuwayn, south of Mosul, after recapturing the village from Islamic State group jihadists.

Iraqi forces talk with a family in the village of al-Khuwayn, south of Mosul, after recapturing it from Islamic State.

Iraqi government forces walk in the village of al-Khuwayn, south of Mosul, after recapturing it from Islamic State.

Internally displaced persons stand at a checkpoint as an Iraqi army convoy passes by in Qayyarah, about 31 miles south of Mosul.

Local residents look on as an oil well burns in Qayyarah, about 31 miles south of Mosul, Iraq.

Iraqi Army tanks move towards the formerly Islamic State held town of Bartella, two days after its liberation, some 17 miles East of Mosul, Iraq.

Burned bible story books lay on the ground of a damaged church in the formerly Islamic State held town of Bartella.

Iraqi special forces soldiers rest inside the formerly Islamic State held town of Bartella.

An Iraqi counter terrorism soldier makes safe a suicide bomb during the offensive to recapture the city of Mosul from Islamic State militants in Bartella, Iraq. Despite stiff opposition, Iraqi and Kurdish forces have continued advancing towards Iraq's second largest city of Mosul and are now within 5 miles of the city where ISIS fighters have spent months building elaborate defenses in anticipation of the offensive.

An Iraqi soldier walks past a broken statue of the Virgin Mary in the predominantly Christian village of Bartella during the offensive to recapture the city of Mosul from Islamic State militants.

An Iraqi counter terrorism soldier looks over the broken glass shield of his armored vehicle during the offensive to recapture the city of Mosul from Islamic State militants.

Displaced Iraqi families arrive at a checkpoint east of Mosul as they flee areas of unrest during an operation by the Iraqi army to retake Mosul from the Islamic State.

Iraqi forces units hold a position near the village of Tall al-Tibah, south of Mosul, during an operation to retake the main hub city from the Islamic State.

Iraqi forces wear gas masks for protection as smoke billows in the background after Islamic State (IS) group jihadists burned the Mishraq sulphur factory, near Mosul. Toxic fumes from the plant killed two Iraqi civilians, made many ill and forced U.S. troops at a nearby base to wear masks.

Iraqi Special Forces soldiers hold a cross found in the town of Bartella, Iraq. Iraqi forces retook Bartella, around 15 kilometers east of Mosul, earlier this week, but are still facing pockets of resistance in the area.

A member of the Iraqi Special Forces guards a checkpoint near the village of Awsaja, Iraq. Smoke from fires lit by Islamic State militants at oil wells and a sulfur plant fill the air. U.S. military officials say that a fire at the sulfur plant in northern Iraq is creating a potential breathing hazard for American forces and other troops at a logistical base south of Mosul.

Shiite fighters from the Popular Mobilization Forces arrive in an area south of Mosul during an operation to retake the main hub city from the Islamic State.

A member Iraq's elite counterterrorism forces raises an Iraqi flag after retaking Bartella, outside Mosul, Iraq. Iraqi and Kurdish forces backed by a U.S.-led coalition launched a multi-pronged assault this week to retake Mosul and surrounding areas from Islamic State militants.

Shiite fighters from the Popular Mobilisation units gather before heading towards Mosul to support the government forces during the ongoing operation to retake the city from the Islamic State group on October 20, 2016. The operation is Iraq's biggest in years and aims to wrest back Mosul, the country's second city and the last major IS stronghold in Iraq.

Displaced Iraqi boys ride a donkey as they lead their flock after fleeing their home in the village of Tal al-Shawk on the eastern bank of the Tigris river as Iraqi government forces launched an assault on the village during the ongoing operation to retake Mosul from the Islamic State group.

Shiite fighters from the Popular Mobilisation units head towards Mosul to support the government forces during the ongoing operation to retake the city.

A helicopter lands on a road in Nawran village, some 10km north east of Mosul during the ongoing operation to retake the city from the Islamic State group. The operation is Iraq's biggest in years and aims to wrest back Mosul, the country's second city and the last major IS stronghold in Iraq.

Displaced Iraqi families from the village of Tal al-Shawk on the eastern bank of the Tigris river rest after fleeing their homes as Iraqi government forces launched an assault on the village during the ongoing operation to retake Mosul from the Islamic State group.

Iraqi Kurdish Peshmerga fighters march down a road in Nawran village, some 10km north east of Mosul during the ongoing operation to retake the city from the Islamic State group.

Smoke billows from an area near the Iraqi town of Nawaran, some 10km north east of Mosul, as Iraqi Kurdish Peshmerga fighters march down a dirt road during the ongoing operation to retake the city from the Islamic State (IS) group.

Iraqi army soldiers raise their weapons in celebration on the outskirts of Mosul, Iraq. Iraqi special forces charged into the Mosul battle Thursday with a pre-dawn advance on the nearby town held by the Islamic State group, a key part of a multi-pronged assault on eastern approaches to the besieged city.

A member of Iraq's elite counterterrorism forces pauses as they advance towards the city of Mosul, Iraq. Iraqi special forces, which barreled into a town east of Mosul on Thursday despite a wave of suicide attacks, are the country's most professional and least sectarian fighting force. Officially known as the Counter Terrorism Service, the troops have played a key role in wresting back towns and cities from IS, and are expected to lead the charge in Mosul.

A Kurdish peshmerga soldier fires at an ISIS position during an assault to recapture the village of Tiskharab near Mosul, Iraq. Kurdish and Iraqi forces, supported by numerous countries including Britain and the USA, have continued their advance towards towards Iraq's second largest city of Mosul which has been held by Islamic State militants since 2014.

A member of the Iraqi government forces takes a position on top of a vehicle as smoke rises on the outskirts of the Qayyarah area, some 35 miles south of Mosul during an operation against Islamic State group jihadists to retake the main hub city.

A Kurdish peshmerga tank moves forward during an assault to recapture the village of Tiskharab near Mosul, Iraq.

Iraqi Kurdish peshmerga fighters stand in an area near the town of Bashiqa, northeast of Mosul, as smoke billows on Oct. 20, 2016, during an operation against Islamic State jihadists to retake the main hub city. Kurdish forces launched a fresh push against areas held by the Islamic State group around Mosul, pressing an offensive to retake the jihadists' last major stronghold in Iraq.

Iraqi Kurdish Peshmerga fighters fire a multiple rocket launcher from a position in Sheikh Ali village near the town of Bashiqa, northeast of Mosul on Oct. 20, 2016, during an operation against Islamic State jihadists to retake the main hub city.

An Iraqi Kurdish Peshmerga fighter holds a position in Sheikh Ali village near the town of Bashiqa on Oct. 20, 2016.

Iraqi forces sit in the back of a vehicle as troops advance through the desert on the banks of the Tigris river, northeast of the main staging base of Qayyarah, on Oct. 20, 2016.

A man stands in front of an oil fire in the Qayyarah area Oct. 19, 2016.

Iraqi soldiers look on as smoke rises from the Qayyarah area Oct. 19, 2016.

An Iraqi man walks on a street covered with smoke after a fire from oil was set ablaze in the Qayyarah area Oct. 19, 2016.

Iraqi soldiers walk on a road as smoke billows from the Qayyarah area Oct. 19, 2016.

Iraqi army soldiers man a checkpoint as oil wells burn on the outskirts of Qayyarah, Iraq, on Oct. 19, 2016. A senior Iraqi general called on Iraqis fighting for the Islamic State group in Mosul to surrender as a wide-scale operation to retake the militant-held city entered its third day.

An Iraqi forces M109 self-propelled howitzer fires towards the village of Tall al-Tibah, about 19 miles south of Mosul, on Oct. 19, 2016, during an operation against the Islamic State.

A Kurdish soldier aims his rifle toward a road to Mosul as forces continue the battle to retake Mosul on Oct. 19, 2016 in Bashiqa, near Mosul in Iraq.

Iraqi forces hold a position near the village of Tall al-Tibah, some 19 miles south of Mosul, on Oct. 19, 2016, during an operation against the Islamic State.

Iraqi forces hold a position near the village of Tall al-Tibah, south of Mosul, on Oct. 19, 2016.

Displaced people flee their homes during clashes between Iraqi security forces and members of the Islamic State fleeing Mosul, Iraq, on Oct. 19, 2016.

An Iraqi man herds his sheep as smoke billows from the Qayyarah area, about 35 miles south of Mosul on Oct. 19, 2016.

Iraqi forces fire a M109 self-propelled howitzer towards the village of Al-Muftuya from a position in Kani al-Harami, about 22 miles south of Mosul during an operation against ISIL on Oct. 19, 2016.

Iraqi army soldiers raise their weapons in celebration on the outskirts of Qayyarah, Iraq, on Oct. 19, 2016.

Iraqi special forces advance towards the city of Mosul, Iraq, on Oct. 19, 2016. A senior Iraqi general called on Iraqis fighting for the Islamic State group in Mosul to surrender as a wide-scale operation to retake the militant-held city entered its third day.

Workers set up a camp for displaced Iraqis in Khazer, Iraq, on Oct. 19, 2016. More than 25,000 troops have mobilized for the Mosul fight, a massive operation that's expected to take weeks, if not months. Mosul is Iraq's second-largest city and the largest urban area controlled by the Islamic State militants.

Displaced Iraqis from the Bajwaniyah village, south of Mosul, who fled fighting in the Mosul area walk towards security forces on Oct. 18, 2016, after they liberated the village from Islamic State group jihadists.

Smoke rises from burning oil wells on Oct. 18, 2016, near the town of Qayyarah, south of Mosul, during the operation to recapture the city from the Islamic State.

Members of Iraqi forces walk near a MRAP armored vehicle used by U.S. forces supporting Iraq troops during the operation to recapture Mosul from the Islamic State at the Qayyarah military base, about 35 miles south of the city, on Oct. 18, 2016.

Iraqi forces battle against Islamic State jihadists in the Bajwaniyah village, south of Mosul, on Oct. 18, 2016, as they advance to liberate Mosul from the militants.

An Iraqi Kurdish Peshmerga fighter stands inside of a building on Oct. 18, 2016 on the frontline in the Shaqouli village, east of Mosul, after they recaptured it from the Islamic State.

A Kurdish Peshmerga fighter leans out of his military vehicle which has taken several direct hits from Islamic State snipers on Oct. 18, 2016, in the small town of Bartella near Mosul, Iraq.

Displaced Iraqis from the Bajwaniyah village, about south of Mosul, who fled fighting in the Mosul area carry a white flag as they approach security forces on Oct. 18, 2016 after the village was liberated.

Displaced Iraqis from the Bajwaniyah village flee the fighting on Oct. 18, 2016.

Iraqis from the Bajwaniyah village, south of Mosul, flee the fighting in the Mosul area.

Smoke rises as people flee their homes during clashes between Iraqi security forces and members of the Islamic State, Oct. 18, 2016. The pace of operations slowed on Tuesday as Iraqi forces began pushing toward larger villages and encountering civilian populations on the second day of a massive operation to retake the northern Iraqi city of Mosul from the Islamic State group.

People rest as they flee their homes during clashes between Iraqi security forces and members of the Islamic State group fleeing Mosul, Iraq on Oct. 18, 2016.

Displaced Iraqi Christians take part in celebrations on October 18, 2016 in Arbil, Iraq to mark the liberation of Qaraqosh, that was Iraq's largest Christian town before it was overrun by the Islamic State in August 2014.

Iraqi forces patrol in the Bajwaniyah village on Oct. 18, 2016 after they liberated the village from Islamic State.

An Iraqi forces member dressed in camouflage walks in the Bajwaniyah village, south of Mosul, on Oct. 18, 2016.

Iraqi forces battle against Islamic State in the Bajwaniyah village near Mosul on Oct. 18, 2016.

Kurdish Peshmerga soldiers stand around a tunnel dug by ISIL in a house recently recaptured by the Kurds during the battle to retake Mosul, on Oct. 18, 2016 in Bartella, near Mosul, Iraq.

Iraqi forces deploy in the Bajwaniyah village, south of Mosul, on Oct. 18, 2016 after they liberated it from Islamic State.

Peshmerga forces take part in an operation to liberate several villages from the control of the so-called Islamic State (IS) militant group, southeast of Mosul, Iraq on Oct. 18, 2016. Iraqi Prime Minister Haider al-Abadi said on Oct. 17 that Iraqi forces started their military offensive to recapture the city of Mosul from IS. The operation, led by Kurdish Peshmerga, Iraqi government forces and allies, is backed by the US-led coalition. Iraq's second largest city, Mosul, fell under the jihadist militant group's control in June 2014.

A Member of Iraqi special forces looks through the window of an armored vehicle during a military operation to liberate several villages from the control of the so-called Islamic State (IS) militant group, east of Mosul, Iraq on Oct. 18, 2016.

A Peshmerga soldier inspects burned trucks used by Islamic State militants after heavy clashes with Iraqi forces on Oct. 18, 2016.

A peshmerga fighter walks through a tunnel made by Islamic State fighters on Oct. 18, 2016. The Kurdish forces found the tunnel in the town of Badana that was liberated from the Islamic State group on Monday. The fighters built tunnels under residential areas so they could move without being seen from above to avoid airstrikes.

A Kurdish Peshmerga soldier walks at a new refugees camp in Khazir town near Mosul on Oct. 18, 2016. The camp was created to receive people expected to flee from Mosul during the military operation to liberate the city from the control of the so-called Islamic State (IS) militant group.

This image made from video by Rudaw News Agency shows a family fleeing Mosul, Iraq on Oct. 18, 2016. Residents who have endured more than two years of militant rule describe a city under siege, and say a new sense of terror has set in since Iraq announced the start of a long awaited operation to liberate its second largest city.

A woman walks with children at a refugee camp housing Iraqi families who fled fighting in the Mosul area on Oct. 17, 2016 in the northeastern town of al-Hol in Syria's Hasakeh province. The battle to retake the Iraqi city of Mosul from jihadists could unleash a massive humanitarian crisis, potentially pushing hundreds of thousands to flee their homes as winter sets in.

A child plays at a refugee camp housing Iraqi families who fled fighting in the Mosul area on Oct. 17, 2016, in the northeastern town of al-Hol in Syria's Hasakeh province.

A peshmerga convoy drives towards a front line in Khazer, about 19 miles east of Mosul, Iraq, on Oct. 17, 2016. The Iraqi military and the country's Kurdish forces say they launched operations to the south and east of militant-held Mosul early that morning.

Iraqi Kurdish peshmerga fighters hold a position on the top of Mount Zardak, about 15.5 miles east of Mosul, as they take part in an operation against Islamic State group jihadists, on Oct. 17, 2016.

Iraqi Kurdish peshmerga fighters fire a multiple rocket launcher from the top of Mount Zardak, east of Mosul, as they take part in an operation against Islamic State group jihadists, on Oct. 17, 2016.

Iraqi Kurdish peshmerga fighters fire a mortar shell from the top of Mount Zardak on Oct. 17, 2016.

A picture taken from the top of Mount Zardak shows smoke billowing in the Iraqi city of Nineveh, during an operation against Islamic State jihadists, on Oct. 17, 2016.

Iraqi policemen inspect their weapons at the Qayyarah military base, about 35 miles south of Mosul, on Oct. 16, 2016, as they prepare for an offensive to retake Mosul, the last Islamic State-held city in the country, after regaining much of the territory the jihadists seized in 2014 and 2015.

Iraqi forces gather at the Qayyarah military base, about 35 miles south of Mosul, on Oct. 16, 2016, as they prepare for an offensive to retake Mosul, the last ISIL-held city in the country.

An Iraqi policeman tries on a gas mask at the Qayyarah military base as they prepare for an offensive to retake the city of Mosul.

Iraqi forces gather at the Qayyarah military base, south of Mosul, on Oct. 16, 2016.

Iraqi policemen clean a weapon at the Qayyarah military base, south of Mosul, Oct. 16, 2016, before an operation to try to retake the city.

An Iraqi policemen checks his weapon at the Qayyarah military base before an operation to retake the city of Mosul.