The shooting took place at about 11:17 p.m. at 15 Albany Avenue in the Bedford-Stuyvesant neighborhood, at a gathering attended by many young people and teenagers.
A 20-year-old woman was shot and later died at Woodhull Medical Center, the police said. The 14-year-old girl was struck in the buttocks and was rushed to Maimonides Medical Center, where she was in stable condition.
The other victims included a 16-year-old boy, who was hit in the torso and was in critical condition at King County Hospital Center, and a 15-year-old boy, who was shot in the leg and was in stable condition at Maimonides, the police said.
Three others were wounded but were expected to survive: an 18-year-old woman shot in the leg, an 18-year-old man also struck in the leg and a 19-year-old man hit in the torso, the police said. The motive for the shooting remained unclear.
Shootings have doubled this year in New York City over last year, with at least 1,660 incidents, and murders have risen by about 37 percent, to about 400.
“We’re seeing a tremendous uptick that has us concerned,” Assistant Chief Judith Harrison, who oversees the police department’s Brooklyn North command, said at an overnight news conference.
The party at Albany Avenue appeared to be a continuation of an earlier gathering for a “Sweet 16” celebration that had been broken up around 7 p.m. at a hall in East New York, the police said. Not long after that party dispersed, a 17-year-old boy who had attended was shot in the leg a block and a half from the hall, the police said. He was expected to survive.
The police believe two gunmen arrived to 15 Albany Avenue at around 11 p.m. and opened fire outside the front entrance. They then walked into the lobby and continued firing as they walked upstairs to the third floor, the police said.
Detectives believe the two shootings are connected, said Deputy Chief Michael Kemper, who oversees the detective bureau in Brooklyn North, where the shooting took place.
“It could be a retaliatory shooting or it could be a continuation,” Chief Kemper told reporters at the overnight news conference.