Grand Canyon National Park officials are investigating a YouTube video posted over the weekend that appears to show a man luring a squirrel to the edge of a cliff and kicking it into the canyon below.

The video -- which was quickly taken down and then republished by other users -- shows two French-speaking men wearing boxer shorts and cowboy hats, laughing as they lead the animal to the edge of the canyon. One of the men puts on a shoe and kicks the animal, launching it off the cliff.

An EXTREMELY GRAPHIC iteration of the video is above.

Officials confirmed with AZCentral that they're investigating the incident. It's not yet clear who the men are, whether they'll face charges, or even if the video is real. The only thing park officials know for certain is where the video was shot.

"The rangers do believe it is at Grand Canyon in the national park," Grand Canyon National Park spokeswoman Kirby-Lynn Shedlowski told the news site. "It is under investigation. We are working with YouTube to see if we can get any additional information."

She said it'll be "problematic" to identify the men in the video.