More than 250 first responders were at the scene in Brooklyn, working to find survivors who may have been trapped under the rubble of the three-storey building.
At least two people died and more than 17 others were injured on Wednesday after a three-storey building in Brooklyn collapsed into an open construction site, officials said.
The collapse in New York City sparked a massive search-and-rescue operation as first responders tried to reach anyone trapped under the rubble.
The building came down suddenly at about 16:00 local time, 21:00 GMT, on Wednesday afternoon.
Authorities were yet to determine what caused the sudden collapse at the Brooklyn site.
A dangerous search for survivors continues after the three-storey building collapsed in Brooklyn on Wednesday afternoon.
An official said people from the collapsed building and also the construction site had been trapped.
Hours later, aerial video showed firefighters pulling a survivor, covered in dust, out of the debris on a stretcher.
The Brooklyn building was built in 1930, city records show, according to the BBC's US partner CBS News.
With the cause still unknown, the search for survivors continues at the construction site where the building fell.