Members of Iraq's elite counter-terrorism service secure on December 27, 2015 the Hoz neighbourhood in central Ramadi (AFP)

Iraqi Security forces with national flag enter downtown Ramadi, 70 miles (115 kilometers) west of Baghdad, Iraq, Sunday, Dec. 27, 2015 (AP)

Members of Iraq's elite counter-terrorism service secure on December 27, 2015 the Hoz neighbourhood (AFP)

A member of Iraq's elite counter-terrorism service flashes the "V" for victory sign on December 27, 2015 in (AFP)

An Iraqi military helicopter prepares to attack Islamic State extremists, as Iraqi Security forces enter downtown Ramadi, 70 miles (115 kilometers) west of Baghdad, Iraq, Sunday, Dec. 27, 2015 (AP)

Iraqi Security forces enter the heavy damaged downtown Ramadi, 70 miles (115 kilometers) west of Baghdad, Iraq, Sunday, Dec. 27, 2015 (AP)

A member of Iraqi pro-government forces stands amid the rubble of destroyed buildings in the Hoz neighbourhood in central Ramadi, the capital of Iraq's Anbar province, about 110 kilometers west of Baghdad, on December 27, 2015 (AFP)