Chris Brown and Drake reportedly had a fight over Rihanna which resulted in Chris getting bottled.
Police are investigating a nightclub brawl at SoHo club W.i.P. in New York that erupted during the early hours of Thursday and is said to have involved Chris Brown and Drake.
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The two musicians have a long-running feud over Rihanna, who briefly dated Drake after breaking up with Chris Brown three years ago.
Reports suggest Chris Brown sent a bottle of champagne to Drake's table as a peace offering.
Rumours claim that Drake returned the bottle with a note, which a witness at told the New York Post said: "I'm f****** the love of your life, deal with it".
A fight then broke out just before 4am as the last song was playing, and witnesses report that a bottle was thrown by one of Drake's entourage, which hit Chris Brown.
Several more bottles were thrown as innocent bystanders got caught up in the fracas, including a 24-year-old Australian tourist who needed 16 stitches and a tetanus shot, according to TMZ.
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Both Chris Brown and Drake are thought to have left the club before NYPD officers arrived at the scene after receiving a call that five people were injured, authorities said.
The New York Police department confirmed to Global Grind the two entourages got into a fight and the injured parties included Chris Brown's bodyguard, who suffered a serious cut to the head, plus two men and two women who suffered minor cuts, with at least three of them being hospitalised.
Chris Brown later tweeted a photo of himself left with a bloody gash on his chin, which he has since removed. He has also removed various tweets about the incident, such as: "Bottles? It's nothing! Lol" and: "How u party with rich n**** that hate? Lol....Throwing bottles like girls? #shameonya!"
Drake's spokeswoman Kelly Bush said: "Drake did not participate in any wrongdoing of any kind last night at W.i.P. He was on his way out of the club when the altercation began. He did not engage in any activity which resulted in injury to person or damage to property."
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Chis Brown's rep said in a statement: "Chris, Karrueche and his friends were victims of a brutal attack last night at W.i.P. They sustained several injuries. Chris and his party are cooperating with NY authorities who are pursuing this incident further."
The incident follows reports that Chris Brown and Rihanna having been spending time together.
Rihanna is said to be "distraught" over the incident, with a friend telling Hollywood Life: "When she heard they were fighting and apparently over her, she shook her head and was like, 'You've got to be f******kidding me'. She clearly doesn't want anyone fighting and especially not over her."