The Pentagon said it was investigating a video made public Wednesday that appears to show four U.S. Marines urinating on the bodies of three dead men in Afghan clothing.

In the video, which was posted on YouTube and the celebrity gossip site TMZ, the four men wearing helmets and Marine uniforms unzip their pants and urinate on the bloody bodies.

When and where the video was taken could not be determined. Most Marines in Afghanistan are at bases in Helmand province in the south.

“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 statement from the Marine Corps’ public affairs office said. “This matter will be fully investigated.”

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