Jing Wu (in photo), 47, of Mountain View, shot and killed one woman and two men inside a Silicon Valley office building just before 4:00 P.M. Friday, according to Santa Clara police. Wu had recently been laid off from SiPort, a fabless digital radio semiconductor company in Mountain View. SiPort CEO Sid Agrawal and VP of Operations Brian Pugh have been confirmed dead. Police are withholding the woman's name until her next of kin have been notified. Wu remains at large Friday night, and police warned that he should be considered armed and extremely dangerous. Ongoing coverage: San Francisco Chronicle / San Jose Mercury News. (Photo courtesy Santa Clara Police Department)