IRVINE, Calif. — The search for a fugitive ex-police officer wanted in the slayings of three people took police to a San Fernando Valley home improvement store and to the home of a possible target in a quiet Southern California suburb.

Also, authorities have set a $1 million reward for information leading to the arrest of Christopher Dorner and small towns remained on edge from the din of police helicopters and cruisers staking out schools.

Authorities have been working to protect dozens of families in the area considered targets based on Christopher Dorner's Facebook rant against those he held responsible for ending his career with the Los Angeles Police Department five years ago.