NBC NEW YORK– Police are investigating a bar brawl that erupted after a dispute between Chris Brown and Drake early Thursday at a Manhattan nightclub, NBC 4 New York has learned.

Sources tell NBC 4 New York that Brown sent a bottle of Champagne to Drake’s table as a peace offering because the pair have had an ongoing dispute. Drake then allegedly sent back the bottle with a note that he was still sleeping with Rihanna, Brown’s ex-girlfriend.

Brown’s bodyguard has told detectives that the rappers exchanged words, sources said. And then as Brown was leaving the SoHo club with his bodyguard, members of Drake’s entourage confronted him.

Witnesses say there was a brief staredown between the groups, and members of Drake’s group removed their shirts. Pushing and shoving then ensued.

Sources tell NBC 4 New York that someone in the crowd threw ice, and then bottles were thrown.

Brown’s bodyguard was struck in the head and Brown was escorted out of the club into a waiting car.

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Copyright 2012 The Associated Press.