From New York Times:
It had been a quiet April afternoon until about a dozen teenagers began running up Pitkin Avenue in Brownsville, yelling and cursing. They were chasing a girl of about 14 and it was clear they wanted a fight.
Five plainclothes police officers watched warily. Across Pitkin stood about half a dozen men, civilians in jeans and purple-and-gray sweatshirts.
“They got it,” an officer said.