Displaced Iraqis flee their homes due to fighting between Iraqi special forces and Islamic State militants, on the western side of Mosul, Iraq, Thursday, February 23, 2017. The Iraqi security forces advance comes as part of a major assault that started five days earlier to drive Islamic State militants from the western half of Mosul, Iraq's second-largest city. (Photo by Khalid Mohammed/AP Photo)





A civilian plants a white flag in the berm as he arrives at the defense line of Iraqi federal police forces in the town of Abu Saif after escaping Islamic State territory, Tuesday, February 21, 2017. (Photo by Bram Janssen/AP Photo)





Iraqi army launch a rocket towards Islamic State militants during a battle with Islamic State militants near Ghozlani military complex, south of Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





Counter-terrorism service (CTS) troops advance towards Ghozlani military complex, south of Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





Iraqi army launch a rocket towards Islamic State militants during a battle with Islamic State militants near Ghozlani military complex, south of Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





Counter-terrorism service (CTS) troops advance towards Ghozlani military complex, south of Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





Iraqi army launch a rocket towards Islamic State militants during a battle with Islamic State militants near Ghozlani military complex, south of Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





Counter-terrorism service (CTS) troops advance towards Ghozlani military complex, south of Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





Iraqi Counter-Terrorism Service (CTS) members help a wounded civilian fwho fled the violence in the district of Maamoun in western Mosul, Iraq February 23, 2017. (Photo by Alaa Al-Marjani/Reuters)





A man carries lambs as he escapes fight between Iraqi forces and Islamic State fighters south of Mosul, Iraq February 24, 2017. (Photo by Goran Tomasevic/Reuters)





A woman walks with her child as she escapes fight between Iraqi forces and Islamic State fighters south of Mosul, Iraq February 24, 2017. (Photo by Goran Tomasevic/Reuters)





A man carries lambs as he escapes fight between Iraqi forces and Islamic State fighters south of Mosul, Iraq February 24, 2017. (Photo by Goran Tomasevic/Reuters)





An Iraqi Special Forces soldier stands on top of a vehicle in a desert south of Mosul, Iraq February 24, 2017. (Photo by Goran Tomasevic/Reuters)





A displaced Iraqi woman, who fled a village controlled by Islamic State militants, stands with her child inside her tent at the refugee camp in Hammam Ali, south of Mosul, Iraq February 24, 2017. (Photo by Alaa Al-Marjani/Reuters)





Rapid Response forces members cross farm land during a battle with Islamic State's militants south west Mosul, Iraq February 24, 2017. (Photo by Zohra Bensemra/Reuters)





Rapid Response forces members surround an injured boy as they are treat him during a battle with Islamic State's militants south west Mosul, Iraq February 24, 2017. (Photo by Zohra Bensemra/Reuters)





Rapid Response forces members cross farm land during a battle with Islamic State's militants south west Mosul, Iraq February 24, 2017. (Photo by Zohra Bensemra/Reuters)





Rapid Response forces members fire a missile during a battle with Islamic State's militants south west Mosul, Iraq February 24, 2017. (Photo by Zohra Bensemra/Reuters)





An Iraqi army helicopter fires during a battle with Islamic State's militants south west Mosul, Iraq February 24, 2017. (Photo by Zohra Bensemra/Reuters)





Rapid Response forces members cross farm land during a battle with Islamic State's militants south west Mosul, Iraq February 24, 2017. (Photo by Zohra Bensemra/Reuters)





Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in the district of Maamoun in western Mosul, Iraq February 25, 2017. (Photo by Alaa Al-Marjani/Reuters)





A displaced Iraqi child whose family flee their home as Iraqi forces battle with Islamic State militants, is pictured in the district of Maamoun in western Mosul, Iraq February 25, 2017. (Photo by Alaa Al-Marjani/Reuters)





Displaced Iraqi children who flee their homes as Iraqi forces battle with Islamic State militants, are pictured in the district of Maamoun in western Mosul, Iraq February 25, 2017. (Photo by Alaa Al-Marjani/Reuters)





Members of the rapid response forces fire a heavy machine gun during a battle with Islamic State militants in southwest Mosul, Iraq February 25, 2017. (Photo by Zohra Bensemra/Reuters)





Members of the rapid response forces help their injured comrade during a battle with Islamic State militants in west Mosul, Iraq February 25, 2017. (Photo by Zohra Bensemra/Reuters)





Medics from the rapid response forces help an injured members of the federal police during a battle with Islamic State militants in west Mosul, Iraq February 25, 2017. (Photo by Zohra Bensemra/Reuters)





Iraqi security forces help their injured comrade during a battle with Islamic State militants in west Mosul, Iraq February 25, 2017. (Photo by Zohra Bensemra/Reuters)





Members of the Iraqi army launch a rocket towards Islamic State militants during a battle with the IS in western Mosul,Iraq February 25, 2017. (Photo by Alaa Al-Marjani/Reuters)





An Iraqi special forces stand behind a vehicle during a battle with Islamic State fighters at an outskirts of Mosul, Iraq, February 25, 2017. (Photo by Goran Tomasevic/Reuters)





A door of an Iraqi special forces vehicle is seen during a battle with Islamic State fighters at an outskirts of Mosul, Iraq, February 25, 2017. (Photo by Goran Tomasevic/Reuters)





Displaced Iraqis flee their homes during a battle with Islamic State militants walk in Albu Saif, south-west Mosul, Iraq, February 25, 2017. (Photo by Zohra Bensemra/Reuters)





Displaced Iraqis flee their homes during a battle with Islamic State militants, in Albu Saif, south-west, Mosul, Iraq, February 25, 2017. (Photo by Zohra Bensemra/Reuters)





Members of the Iraqi security forces pose from atop an armoured vehicle in the village of al-Buseif, south of Mosul, during an offensive by Iraqi forces to retake the western side of the city from Islamic State (IS) group fighters on February 22, 2017. Al-Buseif, which was retaken by Iraqi forces, is a key checkpoint on the main Baghdad highway south of Mosul and a natural citadel overlooking the airport and the south of the city. (Photo by Ahmad Al-Rubaye/AFP Photo)





Smoke billows in the background as Iraqi forces advance on February 23, 2017 towards Mosul airport on the southern edge of the jihadist stronghold entering the compound for the first time since the Islamic State group overran the region in 2014. Backed by jets, gunships and drones, forces blitzed their way across open areas south of Mosul and entered the airport compound, apparently meeting limited resistance but strafing the area for suspected snipers. (Photo by Ahmad Al-Rubaye/AFP Photo)





An Iraqi Federal Police sniper in camoflage stands at his frontline position near the Islamic State occupied village of Abu Saif, 6 kilometres from Mosul on February 22, 2017 in Nineveh, northern Iraq. Iraqi forces launched the offensive to take western Mosul from Islamic State, on February 19, 2017. (Martyn Aim/Getty Images)





Smoke billows as Iraqi forces attack Mosul airport during an offensive to retake the western side of the city from jihadists of the Islamic State group on February 23, 2017. Iraqi forces entered Mosul airport, which lies on the southern edge of the city, for the first time since the Islamic State group overran the region in 2014. Control of the base and airport would set government forces up to enter Mosul neighbourhoods on the west bank of the Tigris, a month after declaring full control of the east bank. (Photo by Ahmad Al-Rubaye/AFP Photo)





A member of the Iraqi forces aims his weapon on February 23, 2017, as they advance towards Mosul airport on the southern edge of the jihadist stronghold prior to entering the airport compound for the first time since the Islamic State group overran the region in 2014. Backed by jets, gunships and drones, forces blitzed their way across open areas south of Mosul and entered the airport compound, apparently meeting limited resistance but strafing the area for suspected snipers. (Photo by Ahmad Al-Rubaye/AFP Photo)





Iraqi forces advance on February 23, 2017 towards Mosul airport on the southern edge of the jihadist stronghold prior to entering the airport compound for the first time since the Islamic State group overran the region in 2014. (Photo by Ahmad Al-Rubaye/AFP Photo)





Iraqi Emergency Response Division (ERD) officers run from an Islamic State mortar attack near the IS-occupied Mosul Airport in west Mosul, Iraq, February 23, 2017. Iraqi forces encountered stiff resistance with improvised explosives, heavy mortar fire and snipers hampering their advance before they successfully took the airport. (Photo by Martyn Aim/Getty Images)





An injured Iraqi Emergency Response Division (ERD) soldier hit by a mortar is held by another officer as they wait for medics to arrive at the Islamic State occupied Mosul Airport in west Mosul, part of the offensive to retake the city some two years after it fell to the hardline jihadist group, February 23, 2017. Iraqi forces encountered stiff resistance with improvised explosives, heavy mortar fire and snipers hampering their advance before they successfully took the airport. (Photo by Martyn Aim/Getty Images)





Iraqis react after Iraqi troops entered Mosul's southern neighbourhood of Jawasaq on February 24, 2017 during an ongoing offensive to retake the northern city from jihadists of the Islamic State group. Iraqi forces entered west Mosul neighbourhoods, a key stronghold in the shrinking “caliphate” of the Islamic State group, which replied with deadly suicide attacks in Iraq and Syria. The elite Counter-Terrorism Service that did most of the fighting in the four-month-old Mosul offensive entered a neighbourhood further west along the city's southern limits. (Photo by Ahmad Al-Rubaye/AFP Photo)





Injured Iraqi Emergency Response Division (ERD) soldiers hit by mortar shrapnel wait for medics to arrive at the Islamic State occupied Mosul Airport in west Mosul, part of the offensive to retake the city some two years after it fell to the hardline jihadist group, February 23, 2017. Iraqi forces encountered stiff resistance with improvised explosives, heavy mortar fire and snipers hampering their advance before they successfully took the airport. (Photo by Martyn Aim/Getty Images)





Iraqi troops stand next to the body of a fighter after they entered Mosul's southern neighbourhood of Jawasaq on February 24, 2017 during an ongoing offensive to retake the northern city from jihadists of the Islamic State group. (Photo by Ahmad Al-Rubaye/AFP Photo)





Iraqis react after Iraqi troops entered Mosul's southern neighbourhood of Jawasaq on February 24, 2017 during an ongoing offensive to retake the northern city from jihadists of the Islamic State group. (Photo by Ahmad Al-Rubaye/AFP Photo)