A Northern California city has agreed to install surveillance cameras along a stretch of highway where a young mother of four became the latest victim in a rash of freeway attacks.

The decision on Monday by Pittsburg is the latest action aimed at solving and stopping the spate of shootings that have claimed the lives of six people and injured 11 others in the past year.

Police say all 20 drive-by shootings on or near two major highways have been gang related.

The California Highway Patrol, FBI and two dozen local law enforcement agencies have created a joint task force to investigate the shootings.

So far, police have arrested one person suspected of shooting and injuring a motorist on April 1.

The latest shooting occurred on May 10, when 25-year-old Shanique Maria was shot and killed on Highway 4 in the eastern suburbs of San Francisco.