California Highway Patrol Officer Danny Hesser told the Riverside Press-Enterprise the bus from Inland Empire Stages Limited was returning a tour group to Colton – between Riverside and San Bernardino – after a trip to San Diego. Riverside County Fire Department Capt. Rick Griggs said eight people injured in Saturday’s accident on Interstate 215 were listed in critical condition. Bus company Vice President Curtis Basey declined to comment. The crash happened at Perris, about 60 miles southeast of Los Angeles. He said the bus veered to the right and crashed into a sound barrier wall along the highway. PERRIS, Calif. — Investigators in Southern California are still trying to learn why a tour bus crashed into a freeway divider, injuring all 28 people on board.