Federal Police Rapid Response Forces fire a rocket towards Islamic State positions near the old city, in Mosul, Iraq, Monday, March 20, 2017. (Photo by Felipe Dana/AP Photo)





An alleged Islamic State fighter is detained by Iraqi security forces on the western side of Mosul, Iraq, on Thursday, March 23, 2017. The United Nations reported on Thursday that more than 1,000 people have been treated for conflict-related trauma near front lines since the fight for western Mosul began on Feb. 19. (Photo by Felipe Dana/AP Photo)





Four-year-old Mustafa looks after his six-month-old brother at the Hammam Aleel Camp, Iraq, on March 19, 2017. At about 20 km south of Mosul, Hammam Aleel Camp is an important hub for the civilians from Mosul to be relocated. According to a Camp official, more than 35,000 people lived here at the peak, and about 10,000 people are relocated here at present. (Photo by Khalil Dawood/Xinhua/Barcroft Images)





Iraqi Kurdish people carry fire torches up a mountain, as they celebrate Newroz Day, a festival marking their spring and new year, in the town of Akra, Iraq March 20, 2017. (Photo by Ari Jalal/Reuters)





Displaced Iraqis who had fled their homes wait to enter Hammam al-Alil camp south of Mosul, Iraq March 21, 2017. (Photo by Suhaib Salem/Reuters)





A wounded displaced Iraqi girl and her family who had fled their homes wait to enter Hammam al-Alil camp south of Mosul, Iraq March 21, 2017. (Photo by Suhaib Salem/Reuters)





Displaced Iraqis who had fled their homes wait to enter Hammam al-Alil camp south of Mosul, Iraq March 21, 2017. (Photo by Suhaib Salem/Reuters)





Iraqi tourists play with snow at Mount Korek, Iraq March 23, 2017. (Photo by Suhaib Salem/Reuters)





Displaced Iraqi people from Laagada district of Mosul react after they reach safe areas, as Iraqi forces battle with Islamic State militants in the city of Mosul, Iraq, March 23, 2017. (Photo by Youssef Boudlal/Reuters)





Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 24, 2017. (Photo by Suhaib Salem/Reuters)





Iraqi Federal Police fight in the frontline at Bab al Jadid district as the battle against Islamic State's fighters continues in the old city of Mosul, Iraq, March 26, 2017. (Photo by Youssef Boudlal/Reuters)





Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 27, 2017. (Photo by Suhaib Salem/Reuters)





Federal Police Rapid Response Force snipers aims towards Islamic State positions near the old city in Mosul, Iraq, Monday, March 20, 2017. (Photo by Felipe Dana/AP Photo)





A displaced Iraqi woman from Mosul waits upon her arrival at the Hamam al-Alil camp on March 20, 2017, during the government forces ongoing offensive to retake the western parts of the city from Islamic State (IS) group fighters. The forces have recaptured several neighbourhoods 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. (Photo by Ahmad Al-Rubaye/AFP Photo)





An Iraqi girl cries over her father's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul – the most-populated urban area still held by IS – on February 19, and have retaken a series of neighbourhoods from the jihadists. (Photo by Ahmad Al-Rubaye/AFP Photo)





Displaced Iraqis, fleeing fighting between Iraqi security forces and Islamic State militants, are board a truck before being taken to a camp on the western side of Mosul, Iraq, Thursday, March 23, 2017. (Photo by Felipe Dana/AP Photo)





Displaced Iraqi women who fled their homes during a battle between Iraqi forces and Islamic State militants, try to get out of a vehicle with their children at a checkpoint, to be transfer to Hammam al-Alil camp, in Mosul, Iraq, March 20, 2017. (Photo by Thaier Al-Sudani/Reuters)





Relatives and friends dig the graves of two civilians killed during fighting between Iraqi security forces and Islamic State militants on the western side of Mosul, Iraq, Saturday, March 25, 2017. (Photo by Felipe Dana/AP Photo)





Residents gather around the body of a men killed after a house was destroyed during fights between Iraq security forces and Islamic State on the western side of Mosul, Iraq, Friday, March 24, 2017. Residents of the Iraqi city's neighborhood known as Mosul Jidideh at the scene say that scores of residents are believed to have been killed by airstrikes that hit a cluster of homes in the area earlier this month. (Photo by Felipe Dana/AP Photo)





A man is helped after identifying the body of a relative who died in a house that was destroyed during fights between Iraq security forces and the Islamic State on the western side of Mosul, Iraq, Friday, March 24, 2017. Residents of the Iraqi city's neighborhood known as Mosul Jidideh at the scene say that scores of residents are believed to have been killed by airstrikes that hit a cluster of homes in the area earlier this month. (Photo by Felipe Dana/AP Photo)





Residents carry the body of several people killed during fights between Iraq security forces and Islamic State on the western side of Mosul, Iraq, Friday, March 24, 2017. (Photo by Felipe Dana/AP Photo)





A member of the Iraqi forces mans a turret mounted atop a humvee as troops advance towards the Old City in western Mosul on March 24, 2017, during an offensive to retake the city from Islamic State (IS) group fighters. (Photo by Ahmad Gharabli/AFP Photo)





A displaced Iraqi man from Mosul transports the body of his son, who was killed in the government forces ongoing offensive to retake the city from Islamic State (IS) group fighters, as they walk towards the Hamam al-Alil refugee camp on March 24, 2017, after fleeing their city. (Photo by Ahmad Gharabli/AFP Photo)





Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 24, 2017. (Photo by Suhaib Salem/Reuters)





Displaced Iraqis, fleeing fighting between Iraqi security forces and Islamic State militants, wait for a security check before being transferred to a camp on the western side of Mosul, Iraq, Thursday, March 23, 2017. (Photo by Felipe Dana/AP Photo)





Civilian vehicles are used to block a road from potential car-bombs in the Al-Risala neighbourhood west of Mosul as Iraqi forces fight with Islamic State (IS) group fighters, on March 22, 2017, in an ongoing offensive to retake the city from the jihadists. Iraqi forces launched a major operation to recapture west Mosul – the most-populated urban area still held by IS – on February 19, and have retaken a series of neighbourhoods from the jihadists. (Photo by Ahmad Al-Rubaye/AFP Photo)





Displaced Iraqis from Mosul arrive at the Hamam al-Alil camp on March 20, 2017, during the government forces ongoing offensive to retake the western parts of the city from Islamic State (IS) group fighters. (Photo by Ahmad Al-Rubaye/AFP Photo)





A Federal Police officer carries an injured boy through a destroyed train station during fighting between Iraqi security forces and Islamic State militants, on the western side of Mosul, Iraq, Sunday, March 19, 2017. The battle for western Mosul, including the narrow alleyways of the old city, looks to be the most devastating yet for Iraqi civilians trapped between advancing troops and increasingly desperate Islamic State militants. An estimated 750 civilians have been killed or wounded since the push to retake the western half of the city began in late January, and more than 100,000 have fled. (Photo by Felipe Dana/AP Photo)





A man stands outside houses damaged during fights between Iraq security forces and Islamic State on the western side of Mosul, Iraq, Friday, March 24, 2017. (Photo by Felipe Dana/AP Photo)





Relatives and friends pray next to the body of Suheyil Najn Abdullah after he was killed by a sniper trying to flee fighting between Iraqi security forces and Islamic State on the western side of Mosul, Iraq, Thursday, March 23, 2017. (Photo by Felipe Dana/AP Photo)





Iraqi women cry over their brother's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul – the most-populated urban area still held by IS – on February 19, and have retaken a series of neighbourhoods from the jihadists. (Photo by Ahmad Al-Rubaye/AFP Photo)





A displaced Iraqi girl, who fled fighting between Iraqi security forces and Islamic State militants, balances on a swing at the Hassan Sham camp, east of Mosul, Iraq, Tuesday, March 21, 2017. (Photo by Felipe Dana/AP Photo)