The New York City office building that was the site of a mass shooting Monday had significant security measures in place.

Businesses across the U.S. are reevaluating security after a shooting at a New York City office building raised concerns about workplace safety.

The victims of the Manhattan office building shooting are identified as NYPD Officer Didarul Islam, Blackstone executive Wesley LePatner, Cornell grad Julia Hyman and security officer Aland Etienne.