Authorities say 28 people have been injured, eight critically, after a tour bus crashed into a freeway divider in Southern California.

The Riverside County Fire Department says the crash was reported shortly before 5 p.m. Saturday on Interstate 215 in Perris.

Department spokeswoman Cheri Patterson says everyone aboard the bus was injured, including eight people who were taken to the hospital with critical injuries.

The cause of the crash is under investigation.

Perris is about 60 miles southeast of Los Angeles.