Chunk of NYC building collapses in possible explosion50 minutes ago Share Save Grace Goodwin and Sakshi Venkatraman in New York Share SaveFootage captures the moments after partial collapse of apartment buildingA section of a 20-storey residential building partially collapsed in New York City on Wednesday morning, and authorities say there are no injuries. "Somebody in the building next to me, they said that their window even fell, and it's on the 16th floor," another witness told CBS. Others were allowed to return, but the gas to the building has been shut off as authorities investigate. That investigation will determine whether a gas leak caused the explosion, Mayor Eric Adams said. The New York City Housing Authority, which manages the complex, said in a statement that it is investigating the incident and still determining the extent of the damage.