A shooting incident at a sprawling UPS warehouse and customer service center in the US city of San Francisco has left four people dead, including the shooter.
The shooting that happened at a UPS facility close to a freeway in Portero Hill has led to a massive police response. Local media say the shooter turned the gun on himself following the violent attack. Police say the situation is under control and they are hunting for possible accomplices inside the facility. Reports, however, say a lone shooter entered the building during a morning meeting. He has been described as a disgruntled employee.
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