Two of the three people killed in a club shooting in Brooklyn over the weekend were shooters who exchanged gunfire, NYPD Commissioner Jessica Tisch said Monday. Jamel Childs, 35, and 19-year-old Marvin St.

The three men killed were Prospect Lefferts Garden resident Marvin St. Louis, 19, Harlem resident Amadou Diallo, 27, and Flatlands resident Jamel Childs, 35, according to police. Officials did not immediately say if they suspected any of the people who were shot had opened fire at the venue.

Investigators believe up to four shooters were involved, and police fear the violence could spark retaliations. The attack marks the city’s second mass shooting in just weeks. FOX 5 NY's Kendall Green has the latest.