The shootings happened just minutes apart around 12:30 a.m. near the party on Wortman Avenue in East New York.
Arriving officers found three people shot inside a silver Infiniti sedan at the corner of Georgia and Wortman avenues.
Novada Bailey, 36, suffered gunshot wounds to his face, chest and arm was transported to NYC Health + Hospitals/Kings County, where he was pronounced dead.
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Nicholas Palmer, 36, suffered a gunshot wound to the head was rushed to Brookdale Hospital, where he was pronounced deceased.
A 51-year-old man with gunshot wounds to his right forearm, upper back and chest was taken to Brookdale Hospital, where he is listed in critical condition.
One eyewitness described a chaotic scene as he says the Infiniti crashed during the shooting.
"People were rushing to get out when they heard the gunshots," the witness said.
Separately, two others were shot inside Brooklyn Garden Event Space on Wortman Avenue.
A 37-year-old man was shot in the right shoulder was taken via private means to Montefiore Hospital in New Rochelle, where he is listed in stable condition.
The final victim, a 32-year-old man, was wounded in the chest and neck and went to Brookdale Hospital, where he is listed in critical condition.
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There are no arrests at this time, and the investigation is ongoing.
It is unclear at this time if all the victims were targeted.
Police are urging witness to come forward to help them in this investigation, and anyone with information is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
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