The video shows what appears to be four servicemen, dressed in US military uniform, relieving themselves onto three bloodied bodies on the ground, apparently aware that they are being filmed.

“Have a great day, buddy,” one of them says.

The Pentagon has not yet verified the video, but spokesman John Kirby told AFP: “Regardless of the circumstances or who is in the video, this is… egregious, disgusting behavior, unacceptable for anyone in uniform.”

“It turned my stomach,” he added of the video, which was posted on the Live Leak website.