People emerge from New York City manhole – video

New York police are investigating a bizarre mystery involving groups of people emerging from the city's manholes in recent weeks. Video recorded on 29 May shows seven people climb through a manhole at the intersection of Bedford Avenue and Lynch Street in Brooklyn.

The NYPD, to make sure there was not a threat to the public, sent their highly trained Emergency Services Unit officers into the sewer system to make sure nothing nefarious had been left behind by the individuals - nothing was found," the New York City police department told NBC in a statement on 1 June

• New York police investigate mysterious cases of people coming out of manholes