Iraqi students walk in a corridor at the University of Mosul as they arrive to take their exams on June 13, 2017. (Photo by Mohamed El-Shahed/AFP Photo)





Popular Mobilization Forces (PMF) fire towards Islamic State militants during a battle in Qairawan, west of Mosul, Iraq May 23, 2017. (Photo by Reuters/Stringer)





Smoke rises from a bomb attack in clashes between Popular Mobilization Forces (PMF) and Islamic State militants during a battle in Qairawan, west of Mosul, Iraq May 23, 2017. (Photo by Reuters/Stringer)





A displaced Iraqi boy who fled his home with his family, plays at Hammam al-Alil camp south of Mosul, Iraq May 23, 2017. (Photo by Ari Jalal/Reuters)





A member of the Iraqi Federal Police leaves his vehicle during clashes with Islamic State fighters in western Mosul, Iraq May 27, 2017. (Photo by Alkis Konstantinidis/Reuters)





Popular Mobilization Forces (PMF) fire towards Islamic State militants during a battle on the outskirts of Al-Ba'aj, west of Mosul, Iraq May 26, 2017. (Photo by Reuters/Stringer)





A view of a part of western Mosul, Iraq May 29, 2017. (Photo by Alkis Konstantinidis/Reuters)





A member of the Iraqi rapid response forces fire mortar shells towards Islamic State militants during a battle with Islamic State militants in al-Zanjili neighbourhood, north of Old City district of Mosul, Iraq May 30, 2017. (Photo by Alaa Al-Marjani/Reuters)





Displaced Iraqi people who fled from clashes head to safer territory while riding in a cart, in western Mosul, Iraq, June 3, 2017. (Photo by Alaa Al-Marjani/Reuters)





Smoke billows at the position of the Islamic State militants after it was hit by a rocket from an Iraqi military helicopter during fighting in western Mosul, Iraq June 5, 2017. (Photo by Erik De Castro/Reuters)





A member of the Iraqi Federal police rests next to an armoured vehicle at the frontline in western Mosul, Iraq June 4, 2017. (Photo by Alkis Konstantinidis/Reuters)





An Iraqi military armoured fighting vehicle (AFV) drives past a burning Iraqi military truck after it was hit by the Islamic State militants during fighting in western Mosul, Iraq June 5, 2017. (Photo by Erik De Castro/Reuters)





A member of Iraqi military forces rests behind a pillar of a destroyed building, in western Mosul, Iraq June 5, 2017. (Photo by Erik De Castro/Reuters)





Iraqi soldiers from 9th Armoured Division give drops of water to a dehydrated child rescued earlier by soldiers at the frontline, during the ongoing fighting between Iraqi forces and Islamic State militants near the Old City in western Mosul, Iraq June 13, 2017. (Photo by Erik De Castro/Reuters)





A child plays among the ruins of a house in western Mosul on Friday, May 26, 2017, destroyed in a March 17 coalition airstrike that killed more than 100 people. A coalition investigation released on Thursday asserted that the strike had targeted two Islamic State snipers and the destruction had been caused by a large amount of explosives IS militants had placed in the building, a claim disputed by survivors and neighbors. (Photo by Balint Szlanko/AP Photo)





Civilians make their way next to destroyed cars in western Mosul, Iraq June 12, 2017. (Photo by Alkis Konstantinidis/Reuters)





A displaced Iraqi boy carries a cage with pigeons as people arrive to a temporary camp at the compound of the closed Nineveh International Hotel in Mosul on June 16, 2017 which was recovered by Iraqi troops from Islamic State group fighters earlier in the year. (Photo by Mohamed El-Shahed/AFP Photo)





A displaced boy who fled his home walks next Iraqi security forces in al-Zanjili district in western Mosul, Iraq June 7, 2017. (Photo by Erik De Castro/Reuters)





Iraqis staying at the al-Khazir camp swim in a river near the camp for internally displaced people, located between Arbil and Mosul on June 11, 2017. (Photo by Mohamed El-Shahed/AFP Photo)





Displaced Iraqi children wait in line for water rations at the Hammam al-Alil camp for internally displaced people south of Mosul on May 26, 2017, as government forces continue their offensive to retake the city of Mosul from Islamic State (IS) group fighters. (Photo by Karim Sahib/AFP Photo)