A mass shooting overnight at a club in Brooklyn left three people dead and another nine wounded, police officials and the mayor said Sunday morning.

Police are searching for up to four gunmen after a Brooklyn nightclub shooting left 3 dead and 10 injured in what investigators believe was gang-related.

Martin St. Louis died in the Sunday gunfight he started when he fired at Folk Nation gang member Jamel Childs, 35, according to police.

Within minutes, officers arrived, finding that nine men and three women, ranging in age from 19 to 61, had been shot. Three men died. Marvin St. Louis, 19, was pronounced dead at the scene. Amadou Diallo, 27, and Jamel Childs, 35, were critically wounded and succumbed to their injuries at the hospital.

A night of fun turned into a morning of terror as dozens of shots rang out inside a packed Crown Heights hookah lounge before dawn Sunday. PIX11 News spoke with some of the survivors and victims of the mass shooting,

Jamel Andre Childs, 35, tried to cool tempers down at Taste of the City lounge in Crown Heights before the gunfight erupted, friends say.

An off-duty New York City police officer fatally shot a man in Washington Heights on Sunday night, police said.