Here are other major shootings in the Bay Area in recent years:
October 2011: Shareef Allman opens fire on his co-workers during a morning meeting in a trailer at Lehigh Hanson's Permanente Cement Plant in Cupertino, leaving three dead and seven wounded. Allman later dies from a self-inflicted gunshot wound to the head after being confronted by sheriff's deputies in Sunnyvale.
2009: After a traffic stop in Oakland, Lovelle Mixon fatally shoots two police officers and then kills two more in a gunfight in which he also is killed.
2008: Jing Hua Wu, a recently laid-off tech employee, opens fire inside the Santa Clara office of SiPort, killing the CEO and two other employees with a handgun.
2001: Cathline Repunte, a San Jose school bus driver, opens fire at the Laidlaw Transit Inc. bus yard in San Jose, killing a co-worker and wounding three others before being subdued by a fellow driver.
2000: Stuart Alexander, owner of the Santos Linguisa Sausage Factory in San Leandro, fatally shoots three meat inspectors. Alexander allegedly had been seething at regulators he believed would close the factory his family had owned since 1921.
1997: Infatuated with co-worker Maria Elizabeth Guzman Lagman, Kenneth Melton McMurry, a former employee at NEC Electronics in Santa Clara, shoots and kills her and then himself.
1996: Former Richmond Housing Authority employee Michael Pearson kills his supervisor and another agency manager shortly after his termination hearing.
1993: Eight employees at the law offices of Pettit & Martin in San Francisco are killed by distraught businessman Gian Luigi Ferri.
1992: Heavily armed Watsonville man Mark Fredrick Cleaver, reportedly bitter over an insurance settlement from an auto collision, fatally shoots three people and injures four more at a Monterey County flower nursery before taking his own life.
1988: Richard Wade Farley kills seven co-workers at Sunnyvale defense contractor ESL Inc. Farley's shooting spree was inspired by his ill-fated obsession with one co-worker, Laura Black. Farley was sentenced in 1992 to die.
1978: Ex-San Francisco Supervisor Dan White shoots Supervisor Harvey Milk and Mayor George Moscone in City Hall.
Source: Mercury News research