The man who shot dead three people at a UPS warehouse in San Francisco filed a grievance complaining that he was working excessive overtime, a union member has said.
A source said the shooter turned the gun on himself after firing on the victims during the drivers' morning meeting around the time of a shift change. Two other UPS employees were wounded, but Cilia said both were released from the hospital.
Other witnesses described two bodies covered in yellow tarp in the street outside the facility.
Lam had a history of mental illness, according to NBC San Francisco's Laura Garcia Cannon.
Police were still investigating a motive for Lam, who wounded two others in the workplace massacre.
Police say they believe the attack, which was carried out by one person, was not related to terrorism.
San Francisco police officers responded to calls about the shooting at 8:55 a.m. and found one suspect armed with an assault pistol, according to Chaplin. They entered the building and confronted the gunman, who was wearing a UPS uniform. "Violence is never the answer, but the continuing scourge of gun violence is particularly disheartening", Feinstein said.
"This was a frightful scene", Chaplin said. "I feel awful for the people hurt and for the UPS team that was there but survived". "Our thoughts and prayers are with all of those touched by this incident".
SFPD says there are six shooting victims.
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An unnamed San Francisco police official on Wednesday identified Lam as the shooting suspect, the AP reported, while a UPS spokesman confirmed he'd been an employee.
"Local law enforcement are conducting an investigation", Gaut said.
Brent Andrew, from the Zuckerberg San Francisco General Hospital, says the emergency department had multiple admissions from theUPS shooting and "we expect more". The supervisor also told everyone on the scene that they would be interviewed by the police.
At 9:06 a.m., police issued an advisory telling people to avoid the area and find shelter. One driver said the shooting occurred on the third floor of the building.
Police also reportedly blocked off streets surrounding the hospital and were diverting motorists away from the building.
This item has been corrected to show that Toney Chaplin is San Francisco assistant police chief.
Police have completed the search for additional victims. Muni and traffic routes in the area have been rerouted, impacting those on the way to work and school.
"Terrifying. All hell broke loose". A UPS spokesman said several people were injured in the shooting at the facility and that the shooter was an employee. Many were gathered outside at the corners of 16th and Utah and 17th and Utah.