Two of the three people killed in a bar shooting in the New York City borough of Brooklyn were among the four shooters who opened fire inside the building, the city's police commissioner said Monday.

Jamel Childs, 35, and Marvin St. Louis, 19, both of Brooklyn, were seen on surveillance video arguing in the Taste of the City Lounge in Crown Heights shortly before 3:30 a.m. Sunday, Commissioner Jessica Tisch said. About 10 minutes later, St. Louis approached Childs and opened fire, and Childs and two other men fired back. Both Childs and St. Louis were shot multiple times and were pronounced dead at a hospital a short time after the shooting. The third man killed, 27-year-old city resident Amadou Diallo, was pronounced dead at the scene. Authorities said Diallo appears to have been an innocent bystander.

Two other men who also opened fire in the bar remained at large Monday, Tisch said, but she did not disclose further details about them. A possible motive for the shooting remains under investigation, but authorities have said it appears to be gang-related. Tisch said Monday that Childs had a lengthy police record and is listed in a police database as a member of Folk Nation, which she described as a 'violent gang" that 'terrorizes Brooklyn' and is responsible for six shootings this year. She said three people who survived the shooting also have ties to that gang, but St. Louis had no 'relevant criminal history."