A New York City office building where a gunman killed four people then himself has reopened a week after the deadly shootings. On Monday, workers trickled back into 345 Park Avenue in Midtown Manhattan, a skyscraper home to high-profile tenants including the NFL and asset management firm Blackstone.

The Midtown Manhattan building that was the scene of a deadly shooting last week is expected to be back open on Monday, but under very different circumstances.