A police officer in Laurel, Maryland is under investigation after a witness came forward with video of him repeatedly striking a handcuffed man in the head.

Craig Reddix provided NBC Washington with video he shot outside the Laurel Station Bar and Grill, where police were responding to reports of a fight on Sunday.

The video shows two white officers escorting a handcuffed African-American man. One officer can be seen holding the suspect’s arms while the other strikes his head at least three times. It’s wasn’t clear from the video if the officer stuck the man with an open or closed hand.

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An internal investigation was launched after a shift supervisor notified the Laurel Police chief of the incident, according to NBC Washington.

Watch this video from NBC Washington, broadcast Aug. 6, 2012.

View more videos at: http://nbcwashington.com.