The shooting happened just before 11 p.m. near Christopher Avenue and Hegeman Avenue in Brownsville.
The gunfire broke out toward the end of an annual community celebration, the Old Timers Event, and sent people running for their lives.
A 38-year-old man was pronounced dead at Brookdale Hospital, while the other victims were transported to area hospitals. Their conditions have not yet been released.
Police recovered a gun at the playground but it is not clear whether it was the weapon that was used in the shooting.
So far there have been no arrests.
Mayor Bill de Blasio tweeted early Sunday that the incident “shattered a peaceful neighborhood event.”
State Sen. Roxanne J. Persaud expressed frustration with the shooting, which she called “unacceptable” and “cowardly.”
“Our community mourns again. We should be able to have fun in open spaces without fear of violence,” tweeted Persaud, whose district includes Brownsville. “Respect your community. We are better than the violence.”
(The Associated Press contributed to this report.)
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