The attack on a seemingly secure building has rattled workers and prompted managers to examine whether they are adequately protected.

The four victims who were shot and killed by a gunman inside a Midtown Manhattan office building on Monday night have been identified.They include two women — a Blackstone executive and a Cornell graduate — and two security guards,

NYC shooting victims Didarul Islam, Wesley LePatner, Aland Etienne, and Julia Hyman were killed by a gunman inside Manhattan's 345 Park Ave.

The NYPD sent detectives to Las Vegas to work with federal law enforcement in the investigation into Monday's deadly shooting inside a Midtown Manhattan office building.