A gunman in a UPS uniform killed three people and wounded two others before turning his weapon on himself as police approached at a company facility in San Francisco early Wednesday, authorities said.

The San Francisco Police Department said three people were killed and the suspect was dead from a self-inflicted gunshot wound. Two others were wounded.

Assistant Chief Toney Chaplin said at a press conference Wednesday that officers responded to a call of several people shot at the UPS facility at around 8:55 a.m. local time (11:55 a.m. ET).