Police responded to reports of an active shooter who opened fire inside Bronx-Lebanon Hospital at around 2:50 p.m. Friday afternoon, multiple outlets reported.
Mary Murphy, a reporter for PIX11 News, said in a tweet that the suspect was believed to have been wearing a blue shirt and lab coat when he entered the hospital. Police sources told WPIX said that he barricaded himself inside. According to the Associated Press, he shot and killed at least one victim and injured several others before he died by suicide.
First responders were working to secure the scene at the hospital, located at 1650 Grand Concourse, and one hospital staff member who spoke to NBC News said that the building had been put on lockdown.