Fighters of Libyan forces allied with the U.N.-backed government take cover during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government take up position inside a destroyed building during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government walk during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government take cover during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





A fighter from Libyan forces allied with the U.N.-backed government washes his hand during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Smoke rises as fighters of Libyan forces allied with the U.N.-backed government gather during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





A fighter of Libyan forces allied with the U.N.-backed government looks through a pair of binoculars during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government walk during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





A fighter of Libyan forces allied with the U.N.-backed government aims his weapon during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government gather during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government sit in a military vehicle as others walk during a battle with Islamic State militants in Ghiza Bahriya district in Sirte, Libya October 31, 2016. (Photo by Hani Amara/Reuters)





Iraqi army soldiers walk by the river near a bridge destroyed by an airstrike in Qayara, south of Mosul, Iraq, Saturday, November 5, 2016. Islamic State fighters launched counterattacks in the thin strip of territory Iraqi special forces have recaptured in eastern Mosul, highlighting the challenges ahead as the battle moves into more densely populated neighborhoods where coalition air power must be used more selectively. (Photo by Felipe Dana/AP Photo)





People who just fled Kokjali near Mosul walk along the road on their way to a camp for the displaced, east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A man who just fled Kokjali near Mosul smokes a cigarette as he sits on a pickup truck on his way to a camp for the displaced, east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A displaced Iraqi child flees with her family during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 3, 2016. (Photo by Ahmed Jadallah/Reuters)





Displaced Iraqis flee during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 3, 2016. (Photo by Ahmed Jadallah/Reuters)





People who just fled Kokjali near Mosul are seen along the road on their way to a camp for the displaced, east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





Iraqi displaced family holds white flag as they are fileeing during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 03, 2016. (Photo by Ahmed Jadallah/Reuters)





Displaced Iraqi children flee with their family during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 3, 2016. (Photo by Ahmed Jadallah/Reuters)





People who just fled Kokjali near Mosul are seen along the road east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





Displaced Iraqis flee during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 3, 2016. (Photo by Ahmed Jadallah/Reuters)





Shepherds who just fled Kokjali near Mosul are seen along the road east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A displaced Iraqi child flees with his family during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 3, 2016. (Photo by Ahmed Jadallah/Reuters)





A displaced Iraqi child holds a white flag as he flees with his family during a battle with Islamic State militants in Kokjali village near Mosul, Iraq November 3, 2016. (Photo by Ahmed Jadallah/Reuters)





A boy who had just fled Kokjali near Mosul sits in a car along a road east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A girl who had just fled Kokjali near Mosul carries a white flag as she arrives with her family at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. After finding the road to the camp for displaced people closed, the family prepared to spend a night in an open field near the checkpoint. (Photo by Zohra Bensemra/Reuters)





A woman who had just fled Kokjali near Mosul carries her child as she arrives with her family at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A woman who had just fled Kokjali near Mosul carries her child as she arrives with her family at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A woman who had just fled Kokjali near Mosul carries a white flag as she arrives with her family at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





A woman who had just fled Kokjali near Mosul sits with her children after she arrived at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





People who had just fled Kokjali near Mosul sit after they arrived at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





People who had just fled Kokjali near Mosul sit after they arrived at a Peshmerga checkpoint east of Mosul, Iraq November 3, 2016. (Photo by Zohra Bensemra/Reuters)





Iraqi security forces launch a rocket towards Islamic State militants during clashes at a frontline in Ali Rash village, southeast of Mosul, Iraq, November 3, 2016. (Photo by Alaa Al-Marjani/Reuters)





Iraqi security forces launch a rocket towards Islamic State militants during clashes at a frontline in Ali Rash village, southeast of Mosul, Iraq, November 3, 2016. (Photo by Alaa Al-Marjani/Reuters)





Flames and smoke rise from oil wells set ablaze by Islamic State militants before they fled the oil-producing region of Qayyara, Iraq, November 4, 2016. (Photo by Alaa Al-Marjani/Reuters)





A fireman tries to extinguish fires from oil wells, set ablaze by Islamic State militants before fleeing the oil-producing region of Qayyara, Iraq, November 4, 2016. (Photo by Alaa Al-Marjani/Reuters)





Displaced people push their car as smoke rises from oil wells, set ablaze by Islamic State militants before fleeing the oil-producing region of Qayyara, Iraq, November 4, 2016. (Photo by Alaa Al-Marjani/Reuters)





Iraqi security forces walk as fire and smoke rises from oil wells, set ablaze by Islamic State militants before fleeing the oil-producing region of Qayyara, Iraq, November 4, 2016. (Photo by Alaa Al-Marjani/Reuters)





A boy reacts as Iraqi soldiers help him to walk out the front line during a battle with Islamic State in the Intisar disrict of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi soldier holds up a sword he found, which he says is similar to the kind used by Islamic State militants for beheadings, at the front line in the Intisar disrict of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi soldier aims his rifle during a battle with Islamic State, at the front line in the Intisar district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi soldier runs during a battle with Islamic State fighters at the front line in the Intisar district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi soldier keeps watch during a battle with Islamic State fighters at the front line in the Intisar disrict of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi soldier aims his rifle during a battle with Islamic State fighters at the front line in the Intisar district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi soldier aims his rifle during a battle with Islamic State fighters at the front line in the Intisar district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





Iraqi soldiers are seen among dust after a tank fired towards Islamic State fighters' position during a battle in the Shahrazed district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





Iraqi soldiers gather during a fighting with Islamic State fighters, at the front line in the Intisar district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





Iraqi soldiers take a selfie during a fighting with Islamic State fighters near the front line in the Shahrazad district of eastern Mosul, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





An Iraqi army helicopter flies over the Shahrazad district of eastern Mosul during fighting with Islamic State fighters, Iraq November 4, 2016. (Photo by Zohra Bensemra/Reuters)





A tank of Iraqi security forces is seen during a battle with Islamic State militants in Ali Rash, southeast of Mosul, Iraq November 5, 2016. (Photo by Thaier Al-Sudaini/Reuters)





A boy, who just fled the Samah district of eastern Mosul, carries a white flag as he is waiting for his father, who is going through interrogations to ensure he does not belong to the Islamic State group, at the Iraqi Special Forces checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





A boy, who just fled the Samah district of eastern Mosul, stands with the Special Forces holding men's identification cards, as they conduct interrogations to ensure the displaced do not belong to the Islamic State group, at the Iraqi Special Forces checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





A soldier hands a baby to the mother, who had just fled the Samah district of eastern Mosul, on board a military truck at the Iraqi Special Forces checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





An injured special forces fighter is treated at a field hospital in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





A girl who just fled Samah district of eastern Mosul stands with a relative as she arrives at Iraqi Special Forces checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





People who just fled Samah district of eastern Mosul react as they arrive at Iraqi Special Forces checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





A special forces fighter listens to a woman who just fled Samah district of eastern Mosul before she boards a bus at their checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





An army helicopter flies over eastern Mosul's districts, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





A view of the military vest of a special forces soldier at their checkpoint in Kokjali, east of Mosul, Iraq November 5, 2016. (Photo by Zohra Bensemra/Reuters)





A picture taken on November 4, 2016, shows rockets being fired from the Qayyarah military base, south of Mosul, during an operation by Iraqi forces to retake the main hub city from the Islamic State (IS) group jihadists. Elite Iraqi forces pushed deep into the streets of Mosul on Friday facing tough resistance from jihadist fighters who have controlled the city for more than two years, a commander said. (Photo by Ahmad Mousa/AFP Photo)





Iraqi forces flash the sign of victory as they drive their vehicle on November 3, 2016 near Gogjali, which lies on the eastern edge of Mosul, during their ongoing operation against jihadists of the Islamic State group to retake the city of Mosul. Some civilians were leaving Gogjali and others the eastern Mosul neighbourhood of Samah, in what may be a rare breach for civilians trapped inside the city. More than 21,000 people have fled to government-held areas since October 17, while thousands more may have been seized by IS for use as human shields, according to the United Nations. (Photo by Bulent Kilic/AFP Photo)





Children play next to a burning oil field in Qayara, south of Mosul, Iraq, Thursday, November 3, 2016. A senior military commander says more than 5,000 civilians have been evacuated from newly-retaken eastern parts of the Islamic State group-held city of Mosul and taken to camps. (Photo by Felipe Dana/AP Photo)





A boy displaced by fighting stands close to his flock of sheep in the village of Bazwaya, some 8 kilometers from the center of Mosul, Iraq, Thursday, November 3, 2016. After the Islamic State group was pushed out of the eastern edge of Mosul this week, hundreds of civilians are now trapped on the front lines as Iraqi forces continue the operation to retake the militant held city. (Photo by Marko Drobnjakovic/AP Photo)





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, Thursday, November 3, 2016. (Photo by Marko Drobnjakovic/AP Photo)





A displaced man has his hair cut at Jedaa camp in Qayara, south of Mosul, Iraq, Thursday, November 3, 2016. (Photo by Felipe Dana/AP Photo)





A displaced Iraqi family rides back to their home at the outskirts of Qayara, south of Mosul, Iraq, Thursday, November 3, 2016. (Photo by Felipe Dana/AP Photo)





People watch as safety workers try to extinguish fire from a burning oil field in Qayara, south of Mosul, Iraq, Thursday, November 3, 2016. (Photo by Felipe Dana/AP Photo)





An Iraqi special forces soldier sits on a rooftop in Gogjali, an eastern district of Mosul, Iraq, Thursday, November 3, 2016. A senior military commander says more than 5,000 civilians have been evacuated from newly-retaken eastern parts of the Islamic State group-held city of Mosul and taken to camps. (Photo by Marko Drobnjakovic/AP Photo)





People queue to receive aid packages in Gogjali, on the eastern edge of Mosul, Iraq, Thursday, November 3, 2016. (Photo by Marko Drobnjakovic/AP Photo)





An Iraqi special forces sniper gets ready to fire at Islamic State positions on the outskirts of Mosul, Iraq, Friday, November 4, 2016. Heavy fighting erupted in the eastern neighborhoods of Mosul on Friday as Iraqi special forces launched an assault deeper into the urban areas of the city and swung round to attack Islamic State militants from a second entry point, to the northeast. (Photo by Marko Drobnjakovic/AP Photo)





Displaced people in a convoy of cars drive away from Mosul, Iraq, Friday, November 4, 2016. (Photo by Felipe Dana/AP Photo)





Iraqi special forces soldiers fire at Islamic State positions on the outskirts of Mosul, Iraq, Friday, November 4, 2016. (Photo by Marko Drobnjakovic/AP Photo)





Men are held by Iraqi national security agents, to be interrogated at a checkpoint, as oil fields burn in Qayara, south of Mosul, Iraq, Saturday, November 5, 2016. Islamic State fighters launch counterattacks in the thin strip of territory Iraqi special forces have recaptured in eastern Mosul, highlighting the challenges ahead as the battle moves into more densely populated neighborhoods where coalition air power must be used more selectively. (Photo by Felipe Dana/AP Photo)





Iraqi special forces soldiers move in formation in an alley on the outskirts of Mosul, Iraq, Friday, November 4, 2016. Heavy fighting erupted in the eastern neighborhoods of Mosul on Friday as Iraqi special forces launched an assault deeper into the urban areas of the city and swung round to attack Islamic State militants from a second entry point, to the northeast. (Marko Drobnjakovic/AP Photo)