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
A man caught with dozens of turtles inside his pants is to face a court under the US justice system.
Too many family homes are being built around the size of a bathroom too small for people to live in them comfortably, a report says.
The numbers of female officers in police forces must be boosted further as they tackle the "changing face of crime", Theresa May will say.