The shooting happened just after midnight Wednesday at Slick's Go-Go Bar in Irvington, the (Newark, N.J.) Star-Ledger reported.
Police said the suspects were patted down by a bouncer as they tried to enter the club, and when the bouncer felt a gun on one of the suspect, the suspect shot him. The bouncer later died of his injuries.
A second man, who witnesses said was related to the owner of the club, was shot and killed outside the venue, and a third man, who is believed to have been friends with the suspects, was shot and killed. It was unclear whether the third man was accidentally shot.
Two others were wounded in the gunfire.
Police said the suspects fled the scene in a grey sedan.
Justin Bieber crashes Drake Bell's album release party
Putin thinks Obama would save him if he were drowning