There were at least six crime scenes, Orange County sheriff’s spokesman Jim Amormino told KNBC-TV.
The shootings started with an apparent carjacking just after 5 a.m. Tuesday in an unincorporated Ladera Ranch area of Orange County, said Tustin police Supervisor Dave Kanoti.
From 5:30 a.m. to 5:55 a.m., Tustin police received police reports of shootings in several locations, he said.
Officers found one dead person and one wounded at State Route 55 and McFadden Street, two shot and wounded at Interstate 5 and Red Hill Avenue, and one dead at Del Amo Boulevard and Edinger Avenue. The alleged shooter then drove to the intersection of Wanda Road and Katella Avenue and shot himself in the middle of the intersection, Kanoti said.
The conditions of the wounded victims were unknown.
It is possible more people were shot at because some people may have chased the shooter, Kanoti said.
A spokeswoman for the California Highway Patrol said they didn’t have any active crime scenes on the freeway but the southbound 55 McFadden Avenue off-ramp would be closed until further notice.
Kanoti said authorities were trying to figure out if the spree started with the fatal carjacking but could not yet confirm that.
Tustin is about 35 miles southeast of downtown Los Angeles.