Two workers are trapped on a broken piece of scaffold near the top of the 46-storey Hearst Tower in New York City, NBC News reports.
Emergency workers are at the scene.
The damaged equipment appears to be a platform used for cleaning and maintenance.
More top news
The team of best friends took on the 'world's toughest rowing race' in memory of one of their brothers.
Drivers are being warned of hazardous conditions as the big freeze continues to bring disruption to roads and airports.
The president will continue to fight the 'constant hostility' from the press, one of Trump's closest advisers has told ITV News.