"Two of the culprits and their unit involved in the shameful act have been identified," CNN reported quoting a Pentagon spokesman.

"We cannot release the names of the unit as well as the culprits at this time as the matter is being investigated," a Marine spokesman told CNN referring to the video which has gone viral sparking outrage and unrest in Afghanistan and the wider Muslim world.

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, giggling.

“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.

Earlier, The Department of Defence has ordered a probe into the authenticity of the video as well as those who were responsible for this.