Philadelphia police say they are investigating a fight between fans of the Philadelphia Flyers and the New York Rangers outside a Philadelphia restaurant following Monday's NHL Winter Classic. The fight, which happened outside Geno's Steaks in South Philly, was captured on video and posted on YouTube. * Warning * there is some adult language used in the video!

While the names of the men involved in the fight have not been released, NBC News New York identified one of the beaten Rangers fans was an off-duty police officer and former Marine who served in Iraq.