Internally displaced people flee fighting between Iraqi forces and Islamic State militants at the Quds neighborhood, Mosul, Iraq, Friday, December 30, 2016. Iraq's special forces are continuing to push back Islamic State militants in the eastern sector of Mosul. (Photo by Khalid Mohammed/AP Photo)





Displaced children running behind a humanitarian aid truck in Mosul, Iraq, Friday, December 30, 2016. Iraq's special forces are continuing to push back Islamic State militants in the eastern sector of Mosul. (Photo by Khalid Mohammed/AP Photo)





Iraqi forces launch a rocket in Mosul's eastern Al-Intisar neighbourhood on December 30, 2016, during an ongoing military operation against Islamic State (IS) group jihadists. Iraqi forces advanced on December 29 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. (Photo by Ahmad Al-Rubaye/AFP Photo)





Displaced people from Mosul, who are fleeing from Islamic State militants, carry a white flag near Iraqi army personnel, north of Mosul, Iraq, December 29, 2016. (Photo by Khalid al Mousily/Reuters)





Iraqi army personnel reload ammunition during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Khalid al Mousily/Reuters)





Smoke rises from clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces ride on military vehicles during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





A member of the Iraqi army carries rocket launcher during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Smoke rises from clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





A member of the Iraqi army carries rocket launcher during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi army personnel fire toward Islamic State militants, during clashes north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





An Iraqi air force helicopter fires missiles during a battle with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi army gathers during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi army personnel fire toward Islamic State militants, during clashes north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces gather during battle with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





A member of the Iraqi army prays during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 29, 2016. (Photo by Ammar Awad/Reuters)





A member of Iraqi army rides on a tank during battle with Islamic State militants in Mosul, Iraq, December 29, 2016. (Photo by Reuters/Stringer)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





An Iraqi air force helicopter fires missiles during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces take cover during clashes with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces ride on a military vehicle during clashes with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Iraqi security forces ride on military vehicles during clashes with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Civilians flee fighting between Iraqi forces and Islamic State fighters north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Civilians flee fighting between Iraqi forces and Islamic State fighters north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Iraqi soldiers gather during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





Iraqi soldiers gather during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi soldier holds a weapon during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi soldier is seen during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





Iraqi soldiers carry an Islamic State flag which they pulled down during a battle with Islamic State, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





Smoke rises from clashes during a battle with Islamic State, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





Iraqi soldiers carry weapons during a battle with Islamic State, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi soldier inspects weapons used by Islamic State militants during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi soldier is seen during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi soldier is seen during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi army vehicle is seen during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





An Iraqi soldier inspects a military vehicle used by Islamic State militants during a battle with Islamic State militants, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





Iraqi soldiers inspect a tunnel used by Islamic State militants during a battle with Islamic State, north of Mosul, Iraq, December 30, 2016. (Photo by Khalid al Mousily/Reuters)





Civilians flee fighting between Iraqi forces and Islamic State fighters north of Mosul, Iraq, December 30, 2016. (Photo by Ammar Awad/Reuters)





Iraqi Army soldiers inspect defenses in the eastern section of Mosul, Iraq, Friday, December 30, 2016. Iraq's special forces are continuing to push back Islamic State militants in the eastern sector of Mosul. (Photo by Khalid Mohammed/AP Photo)