Nevada ? A mountain resort’s employee shuttle bus crashed on the main highway through California’s Sierra Nevada on Saturday, killing a passenger and injuring 27 others, authorities said.

The bus operated by the Resort at Squaw Creek veered off the road, “struck a guardrail and rolled several times” before stopping in a ditch along Interstate 80, about 20 miles west of Reno, said California Highway Patrol Officer Steve Skeen.

Some of the 30 or so people aboard were thrown from the bus, Skeen said. One was pronounced dead at the scene.

The bus was transporting employees from Reno to the upscale resort north of Lake Tahoe when the accident occurred, said company spokesman Les Pedersen.

“The driver had a very good record,” he said. “The bus had no mechanical problems that I’m aware of.”