A 28-year-old woman was killed outside a Brooklyn party venue early Sunday in a double shooting that also injured a man, according to police.

The slain victim — identified by police as Stephanie Munoz of Bushwick — was blasted once in the stomach around 6:15 a.m. outside the Celebration Events & Party Hall on Atlantic Avenue in Cypress Hills, cops said.

Munoz was raced by ambulance to Jamaica Hospital but pronounced dead on arrival just before 7 a.m.

A 26-year-old man was also shot in the body and taken to NYC Health + Hospitals/Woodhull by private means during the crime. He is expected to survive, sources said.

Police previously identified a 36-year-old man as a victim of the attack, before determining he was actually shot at a different location. That man is being treated at the hospital and is expected to survive.

Detectives were seen early Sunday going into the small party venue, which is open 24 hours. It was not immediately clear what event was happening at the time of the shooting.

Officers were canvassing for video of the attack, and there were no immediate descriptions of the attacker or attackers, sources said.