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.

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.