The California Highway Patrol said 12 people were injured when a tour bus carrying Chinese teens struck a tree near Yosemite National Park and went down an embankment.
Sgt. Michael Schwab told KFSN-TV two of the injured were flown to the hospital with head trauma after Saturday's crash on State Route 41, south of Fish Camp.
Schwab said 22 people were on the bus, most of them 12- to 15-year-old Chinese students and their adult chaperones who were heading to their hotel in Fresno after visiting the park.
Schwab said the bus was operated by A Top Line Tours.
A call to the Monterey Park-based company in Southern California has not been returned.