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.

Three people are dead and nine are injured after multiple shooters opened fire in a New York City lounge, the New York City Police Department says.

Fox News correspondent CB Cotton reports on a Brooklyn nightclub shooting that left three dead, as mayoral candidates face growing pressure to crack down on city violence.

The New York City mayor's race candidates honed in on fighting crime and prostitution after the mass shooting took quality of life issues front and center.

Three men, including a 19-year-old, were killed and nine other people were injured early Sunday when a dispute inside a crowded New York City nightclub erupted into a shooting incident that police said appeared to have involved multiple gunmen firing dozens of shots.

A fatal Crown Heights shooting prompted New York City mayoral candidates to clash over crime policies as city grapples with recent surge in gun violence incidents.

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.

Around four shooters opened fire at a New York City restaurant early Sunday, resulting in three deaths and eight injuries. According to police, the violence is gang-related.