The Islamic State in Syria and Iraq (ISIS) has purportedly released a video showing the aftermath of a raid in northern Iraq by U.S. and Iraqi special forces in which an American soldier was killed.

The video, released by the pro-ISIS news agency Aamaq, allegedly shows the rubble of the prison raided in the town of Huwija, as well as abandoned first aid equipment and mutilated bodies, purportedly of ISIS militants killed in the clashes.

About 70 hostages, including at least 20 members of the Iraqi security forces, were freed from ISIS captivity in Thursday's raid. It was the first time U.S. troops had become involved in direct ground combat in Iraq since the war against the Islamic State was launched in August 2014.

The video could not be immediately verified.

U.S. Army Master Sgt. Joshua L. Wheeler, 39, was killed during the raid in Kirkuk province by enemy small-arms fire.

The Pentagon said it was the first American combat death in Iraq since the U.S. began its counter-ISiS military campaign in August 2014.