Updated at 8 p.m. ET
A gunman opened fire at a New York City area hospital on Friday, killing one person and injuring six others before killing himself, according New York Police Commissioner James O'Neill.
In a brief news conference, O'Neill said the shooter was a former employee of the hospital but did not identify him. A law enforcement source tells NPR that the man was Dr. Henry Bello.
Mayor Bill de Blasio said the attack apparently stemmed from a workplace-related matter but didn't elaborate.
The gunfire reportedly broke out at about 2:50 p.m. ET at the Bronx-Lebanon Hospital Center. O'Neill said police received a 911 call about a shooter on the 16th floor of the hospital. The victims were found on the 16th and 17th floors.
The shooter was found on the 17th floor with an apparently self-inflicted gunshot wound, wearing a white medical lab coat. A rifle was found nearby. The hospital fire alarm system had been activated, O'Neill said, after the gunman attempted to set himself on fire.
A female victim was found dead nearby on the 17th floor. Five other people were injured on the 16th floor and were in serious condition. Another victim was being treated for a gunshot wound to the leg.
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