Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)

Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)

Displaced Iraqis receive food, as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)

Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)

Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)

Displaced Iraqis receive food as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)

Displaced Iraqis flee their homes in Al Mansour district, as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017.(Reuters)

Iraqi security forces advance during fighting against Islamic State militants, in western Mosul, Iraq, Monday, March 6, 2017. (AP)

Displaced Iraqis flee their homes in Al Mansour district, as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017.(Reuters)

A special forces member walks past displaced Iraqis as they flee their homes in Al Mansour district, while Iraqi forces battle with Islamic State militants, in western Mosul, Iraq March 6, 2017. (Reuters)