Shots were fired at the concert venue, at 17 Irving Plaza, around 10 p.m., officials told CBS2.
The shooting happened in the third-floor green room area at the venue, Chief of Manhattan South Detectives William Aubry said at a news conference.
Hip-hop artist T.I. had been scheduled to perform that night, but two other performers – Maino and Uncle Murda – were on the stage at the time, Aubry said.
Four people were struck by gunfire in the shooting.