According to NBC New York, two structural support beams on the 21st floor of a 37-story under-construction building in Manhattan started buckling Tuesday morning, triggering a mass evacuation, street closures and a large emergency response, officials say. The FDNY said it got a call around 8 a.m. about bricks falling from the building at 235 East 42nd Street, between Second and Third avenues. The NYPD says it got a 911 call about the incident less than 15 minutes later. When cops got to the scene, the NYPD says officers were told that construction workers on the 21st floor of the commercial building saw the columns beginning to collapse. It wasn't clear how many workers were in the building at the time. An evacuation was ordered out of caution. Neighboring buildings were also evacuated -- a growing number of them, as the response escalated. #manhattan #highrise #breakingnews