UPS employee fatally shoots 3 co-workers, himself in San Francisco

A UPS employee who had recently filed a grievance opened fire Wednesday inside one of the company's San Francisco packing facilities, killing three co-workers before fatally shooting himself as employees fled frantically into the streets shouting "shooter!," authorities and witnesses said.

The gunman, Jimmy Lam, filed the grievance in March complaining that he was working excessive overtime, Joseph Cilia, an official with a Teamsters Union local that represents UPS workers in San Francisco, told The Associated Press.

Still, Cilia said Lam wasn't angry, and he could not understand why he would open fire on fellow drivers at a morning meeting. Lam appeared to target the three drivers who died, chasing at least one of them out of the building, Cilia said. Cilia said he spoke to witnesses who had been in the meeting of UPS drivers.

"I never knew Jimmy to not get along with people," Cilia said. "Jimmy wasn't a big complainer."

'Go! Go! Go!'

Two other UPS employees were wounded, but Cilia said both were released from the hospital.

Amid a barrage of gunfire, some workers sought refuge on the roof of the four-storey facility, while others ran outside and pounded on the windows of a public bus, witnesses said.

"They were screaming, 'Go! Go! Go!"' said Jessica Franklin, 30, who was riding to work when the bus made a regular stop in front of the UPS facility. "As they got on the bus, they were all ducking."

The shooting prompted a massive police response in one of the city's industrial neighbourhoods, about threekilometresfrom downtown San Francisco, Assistant Police ChiefToneyChaplintold reporters.

'I couldn't hug him'

Police have not yet released victims' names but families and friends identified one of the people killed as 46-year-old MikeLefiti, a UPS driver.

Lefiti'scousin, MackToia, toldKGO-TVhe was at the UPS facility waiting to pick upLefitiwhen he heard shots. He left his van and saw his cousin sprawled on concrete behind a gate,Toiasaid.

"The police officers were right on the scene just like that. I got to touch him, but I couldn't hug him,"Toiasaid. "They just pushed me away because they were trying to resuscitate him."

Toiasaid he was able to tellLefitihe loved him.

'Big Mike'

Co-worker IsaiahMigginssaid he sawLefiti, known as "Big Mike," as he arrived for work just before 9 a.m., a few minutes before the shooting started. "He was a joyful man. Always happy,"Migginssaid.

On social media, heartbroken family members ofLefitirecalled him as a warm-spirited man devoted to his children and family. A photo on hisFacebookpage showsLefitiin his brown UPS uniform holding a trophy. He also posted photos of his UPS truck and an award for 15 years of service to the company in 2015.

Neighbour RaymondDengsaid he heard up to eight gunshots.

"They were all in rapid succession," saidDeng, a 30-year-old tech worker who lives across the street from the warehouse. "It was like tat, tat, tat, tat, tat, tat, tat."

'This was a frightful scene'

Police arrived in minutes.

"This was a frightful scene,"Chaplinsaid. He said officers found two victims outside and others inside and pulled the wounded to safety as they confronted the gunman, who was armed with an "assault pistol."

"The suspect put the gun to his head and discharged the weapon,"Chaplinsaid, adding that police did not fire any shots.

Chaplinsaid police have not determined a motive and were interviewing families of victims and witnesses to piece together what led the gunman to act.

'Lives were saved today'

Mayor Ed Lee condemned the violence and praised authorities for a "very proactive response."

"It could have been worse," he said. "Lives were saved today."

At least 4 dead in shooting at San Francisco UPS plant

7 years ago

Duration 0:46

Shooter reportedly a disgruntled UPS employee

It was not immediately clear how many employees were at the facility, but UPS said the warehouse employs 350 people. The shooter and all the victims were employees, UPS said in a statement.

UPS driverMarvinCalderontoldKNTVthat he recognized the gunman as a fellow employee but did not know him personally.

"I just started running out like crazy, like I've never run before,"Calderontold the TV station.