At least eight people died and 27 others were injured in a multiple vehicle accident in southern California that involved a passenger bus, local media reported.

The KABC television network said the accident occurred at about 6:30 pm local time (0230 GMT Monday) in a rural area north of of the town of Yucaipa.

The injured are being treated at area hospitals. Fifteen of them are reported to be in critical condition, reports said.

According to CBSLA TV, the bus came to the United States from Tijuana, Mexico and headed to Big Bear Lake, a popular mountain ski resort northeast of San Bernardino.

A spokesman for Loma Linda University Medical Center told The Los Angeles Times that the hospital had received four victims from the crash -- two adults and two children. One adult and one child were in critical condition.

"We're expecting more people from the crash," the spokesman, Herbert Atienza, is quoted as saying.