An employee of a quarry opened fire during a company safety meeting today, killing two and wounding six before escaping, officials and witnesses said.
Shareff Allman, 45, reportedly left the quarry and went to the Hewlett-Packard campus where he shot a woman in the leg before carjacking her vehicle, according to ABC's San Francisco affiliate KGO-TV.
Police said they are surrounding a house in nearby Sunnyvale and are evacuating the neighborhood.
Colleagues at the Hanson Permanente quarry in Cupertino described Allman as a disgrunteld employee.
He is armed with an automatic rifle and a handgun, officials said.
Most of the wounded are in critical condition. Santa Clara County sheriff's officials have told KGO-TV that two people died and six are seriously injured.
Two of the wounded were taken to Santa Clara Valley Medical Center for treatment and are reportedly in good and fair condition. Another victim was taken to Stanford University Medical Center in Palo Alto. The hospital has not released any information about the patient's condition.
Police have the road that leads up to the quarry blocked off and a swarm of police cars and ambulances are at the site.