NYC's de Blasio mum after NYPD cops seen on video being harassed

New York City Mayor Bill de Blasio is so far mum after some of his city's police officers were seen on an alarming video being harassed by a group of men.

The city’s largest police union posted the video -- which shows several men surrounding an NYPD SUV and hurling insults at the officers inside -- to Twitter on Friday. They said it was recorded Tuesday in Manhattan’s Washington Heights neighborhood.