Military officials said Wednesday that they’re investigating a video published online showing four men in U.S. Marine Corps (USMC) uniforms urinating on several lifeless bodies purported to be dead Taliban fighters in Afghanistan.

“While we have not yet verified the origin or authenticity of this video, the actions portrayed are not consistent with our core values and are not indicative of the character of the Marines in our Corps,” a USMC spokeswoman told celebrity gossip website TMZ. “This matter will be fully investigated and those responsible will be held accountable for their actions.”

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The video was published by an unknown person with a caption that reads, “scout sniper team 4 with 3rd battalion 2nd marines out of camp lejeune peeing on dead talibans.”

The men pictured have not been positively identified and it was not clear when the video was shot.

An uncensored version of the footage was available via YouTube.