Brooklynites on Twitter reported that police followed the march and searched apartment buildings in the neighborhood without warrants, looking for children who had been seen throwing bottles at police from neighborhood rooftops.

Officers clad in riot gear were seen along the block, and barricades were placed on the streets. March participants chanted,"NYPD / KKK / how many kids will you kill today," witnesses reported.

Police said the crowd fell the 67th Precinct station in East Flatbush, where teenagers who were not apparently a part of any organized group threw garbage and empty bottles at the windows.

"I'm in the middle of the riot action at Church and Snyder in my district. Right now, things are tense," New York City Councilman Jumaane D. Williams, who represents the area, said on Twitter. Williams said people smashed out windows and overturned garbage cans during the disorder, and that one person had been attacked outside of a local Rite Aid.

“Tonight was a peaceful vigil that devolved into a riot,”Williams wrote. “The youth in this community have no outlets for their anger, no community.”