Workers returned to 345 Park Avenue​ under the watchful eyes of NYPD officers and a surplus of security after the NYC mass shooting.

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the heart of Manhattan during rush hour.

Staff slowly return to 345 Park Avenue one week after New York’s Midtown mass shooting - Some high-profile tenants of the Manhattan skyscraper are still working from home