A shooting at a midtown Manhattan office building on Monday left at least five people dead, including an off-duty New York City police officer, sources told the The Associated Press. The suspect was identified as Shane Tamura, of Nevada, two people briefed on the investigation told the AP. Sources said he fatally shot himself.

Law enforcement officials located identification on Tamura's body, including a concealed carry permit from Las Vegas, the people said. The people were not authorized to discuss details of an ongoing investigation and spoke to the AP on condition of anonymity. The Fire Department of New York said emergency crews were called to the Park Avenue office building around 6:30 pm for a report of someone shot. The building houses some of the country's top financial firms and the National Football League.

Jessica Chen told ABC News she was watching a presentation with dozens of other people on the second floor when she 'heard multiple shots go off in quick succession from the first floor.' She and others ran into a conference room and barricaded tables against the door. 'We were honestly really, really scared,' she said, adding that she texted her parents to tell them that she loves them.