A helicopter crashed onto the fog-shrouded roof of a Midtown Manhattan skyscraper on Monday, killing at least one person and unnerving a city still scarred by memories of the Sept. 11, 2001, airplane attacks on the World Trade Center.

The crash occurred shortly before 2 p.m. (1800 GMT) on a rainy, gray day atop the 750-foot (229m) AXA Equitable Center at 787 Seventh Avenue, a few blocks north of Times Square. Dozens of emergency vehicles swarmed the area, shutting down traffic and evacuating offices in one of the city's busiest areas.

The person killed is "presumed" to be the pilot, New York City Mayor Bill de Blasio said at a news conference. No injuries, either to people in the building or on the ground, have been reported.