Two of the three people killed in a New York City nightclub shooting early Sunday have been identified as suspected gunmen who opened fire inside the establishment, injuring up to 11 other people, police officials said on Monday.

Police say two other men who also opened fire in the bar remained at large on Monday, but officials did not disclose further details about them.

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.