Police say the rowdy group marched along Church Avenue near the 67 precinct station in East Flatbush following a vigil for 16-year-old Kimani Gray Monday night.
One person was arrested on disorderly conduct charges. There were no reports of officers injured.
Authorities say Gray was with a group of other males in Brooklyn Saturday night and started acting suspiciously when he saw police in an unmarked car.
When officers identified themselves as they approached him, police say the teen pointed a .38-caliber revolver at the officers, who responded by firing 11 shots, striking him several times.
The two officers have been placed on administrative duty.