Two other people were shot and survived, he said.
Police responded to a report of an active shooter around 8:55 a.m. local time at the UPS San Francisco Customer Center, a couple of blocks east of Franklin Square. The package sorting and delivery facility employs about 850 people.
Officers arrived to learn the suspect was still inside the building, Chaplin said. A police “contact team” soon found him armed with an assault pistol, the assistant chief said.
“The suspect put the gun to his head and immediately discharged the weapon,” he said.
Though the suspect was wearing a UPS uniform, investigators have yet to confirm he was actually an employee, Chaplin said.
There is no indication the shooting was terror-related, he said without providing an actual motive. More information should be available during a 2 p.m. briefing.
The San Francisco police have contained the incident and secured the building, and its special operations unit continues to search the building for victims and witnesses, the department said in a tweet.
A woman named Michelle, who did not want to provide her last name, was walking to work across the street from a UPS facility when she saw several UPS employees running down the street. They told her to run because there had been a shooting, she told CNN, explaining she ran about a block with the workers.
“I was confused. They crossed the street and when they got to me, they said, ‘Run, there is a shooter,’ so I started to run with them,” she said. “Several of them said it was a driver they worked with who had a gun and opened fired. I feel terrible for the people hurt and for the UPS team that was there but…
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