Singer Chris Brown, his girlfriend and his bodyguard were injured when a dance floor showdown with members of hip-hop star Drake’s entourage turned into a bottle-hurling brawl earl Thursday at a nightclub, police said.

Brown tweeted a photo of himself with a cut chin, then later removed it. A representative later released a statement saying the singer and his girlfriend, model Karrueche Tran, were victims of a “brutal attack.”

A representative for Drake said the star was on his way out of the club when the altercation began.

Five bystanders, four women and a man, also suffered cuts during the fight at the club W.i.P. in Manhattan’s SoHo neighborhood, police said.

No arrests have been made and no complaints filed, and no one has identified any one person as an assailant, police said.

It’s not clear what prompted the fight. Both Brown and Drake at one time dated singer Rihanna.