A Black Lives Matter march through Midtown Manhattan turned violent Friday night, with 11 protesters arrested.

The NYPD reported that two officers suffered minor injuries during the protest, which was attended by about 100 marchers; officials could not immediately say how the cops were hurt.

At least some of those arrested were accused of attacking Daily News photographer Sam Costanza at the intersection of Sixth Avenue and 54th Street in the mistaken belief that he was a cop, sources said.

The photog was surrounded and struck after one of the marchers recognized him from a BLM protest outside the NYPD’s 6th Precinct house in Greenwich Village last year, according to sources.