NEW YORK -- A doctor opened fire with an assault rifle Friday inside a New York City hospital where he used to work, killing a woman and wounding six people before turning the gun on himself, law enforcement officials said.
The shooting started a little before 3 p.m. ET at the Bronx-Lebanon Hospital, with 972 beds one of the largest providers of outpatient services in New York. Police said somebody called 911 to report a man with a gun on the 16th floor.
Police converged on the scene and officers found the gunman dead of a self-inflicted gunshot wound on the 17th floor, New York City Police Commissioner James O'Neill said at a news briefing.
The man was wearing a white lab coat and carrying ID and his firearm was nearby, O'Neill said.
The shooter was identified as Dr. Henry Bello, who previously worked at the hospital, two law enforcement officials told CNN. Details about when he worked at the hospital and his duties were not immediately released.
The body of a woman was found close to the gunman's body, O'Neill said. The woman's name was not immediately released.
Six people were wounded on the 16th floor, and five of those are in serious condition from gunshot wounds, O'Neill said Friday afternoon. He said several of the wounded were doctors at the hospital and some were fighting for their lives.
The hospital's fire alarm system went off during the siege, apparently because the shooter tried to set himself on fire, O'Neill said.
So far authorities have not offered a motive. The FBI said the shooting did not appear to be an act of terrorism. New York Mayor Bill de Blasio called it an act of work-related violence.
"The situation unfolded in the middle of a place that people associate with care and comfort," the mayor said.
Video images from the scene showed hospital employees and others coming out of the hospital's main entrance, their hands in the air, and crossing the street toward awaiting police officers.
Scenes from the hospital
Employees and patients described scenes of panic in the crowded hospital, with people taking shelter in closets and rooms.
Krystal Rivera, a 23-year-old patient at the hospital, said she was with her hospital roommate, a visitor and a nurse from the floor when they heard gunshots.
"I barricaded the door with an IV machine, two chairs and my whole bed," Rivera said.
The visitor looked out and saw a man wearing a green top and a white lab coat and saw that he had a rifle, she said.
Ruth Velazquez, an HIV counselor, said staff had trained for incidents such as this.
"We locked every single door in that place, every single door was locked, and we put the patients there, we made sure that our main concern was the patients," she said.
Hospitals have been the site of active shooting situations in recent years.
In January 2015, a patient's family member shot and killed cardiac surgeon Michael Davidson before the shooter killed himself at Brigham and Women's Hospital in Boston.
And in Florida last July, a man entered a patient's room and opened fire, killing an elderly female patient and a female hospital worker, police said. A suspect was taken into custody.