DUARTE, Calif.  — Los Angeles County fire officials say 50 people have been injured in a tour bus crash along a Southern California freeway.

Fire Department supervisor Bryan Webb says five of the injured were flown by helicopters to a trauma center, but most of the others are believed to have relatively minor injuries.

The bus went off the side of Interstate 210 around 10 a.m. Thursday and ended up on its side between the freeway and railroad tracks.

An employee of a travel agency called Da Zhen says the bus was heading to the San Manuel Indian Bingo and Casino in Highland, about 40 miles east of the crash site near the Los Angeles suburbs of Duarte and Irwindale.