A Greyhound bus careened from a highway and plunged into a deep wash, killing a 13-year-old girl and injuring 11 other people on New Year's Eve in rural Utah, state troopers said Monday.
Investigators were still trying to determine what caused the crash along Interstate 70 west of the city of Green River.
However, a passenger reported a possible medical issue with the driver, the Utah Highway Patrol said in a news release.
The Greyhound bus (pictured on January 1) careened from a highway and plunged into a deep wash
A 13-year-old girl was killed and 11 other people were injured in the crash on New Year's Eve in rural Utah
The bus was heading west across the desert from Green River to Las Vegas, Trooper Jared Cornia