A United Parcel Service driver opened fire with a handgun inside a delivery centre in San Francisco on Wednesday, killing three co-workers before fatally shooting himself as police closed in, authorities and company officials said.
Two people wounded by gunfire were taken to a hospital. Five other people suffered less serious injuries in a frantic exit from the building, San Francisco police said.
Live video showed a massive police presence near the facility, with employees being led out and embracing each other on the sidewalk just outside.
Earlier reports said at least three people were injured, including the suspected gunman.
The United Parcel Service Inc delivery centre is located in the Portero Hill, which is about 2.5 miles from downtown San Francisco. San Francisco police said the building was secure, but offered no immediate information on victims.
The incident took place just hours after another shooting in Virginia at a Congressional baseball practice.
The victims were taken to the Priscilla Chan and Mark Zuckerberg San Francisco General Hospital, according to reports.
(With inputs from Reuters.)
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