A disgruntled worker opened fire on Wednesday at a Northern California cement plant and quarry, killing two people and injuring six, police said.

Police station one of many road blocks in the area near the Hewlett-Packard campus during a manhunt in Sunnyvale, California
Police station one of many road blocks in the area near the Hewlett-Packard campus during a manhunt in Sunnyvale, California October 5, 2011. Reuters
Police officers search a suburban street during a manhunt in Sunnyvale, California
Police officers search a suburban street during a manhunt in Sunnyvale, California, October 5, 2011. Reuters
Santa Clara County Sheriff personnel stand around a vehicle of interest before it was transported away in the area near the Hewlett-Packard campus during a manhunt in Sunnyvale, California
Santa Clara County Sheriff personnel stand around a vehicle of interest before it was transported away in the area near the Hewlett-Packard campus during a manhunt in Sunnyvale, California October 5, 2011. Reuters
A vehicle of interest in a shooting and subsequent carjacking is transported away in the area near the Hewlett-Packard campus during a manhunt in Sunnyvale, California
Representational image Reuters
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