Twenty-two people were injured, one of them seriously, when a "gamblers' special" bus flipped over in high winds and blowing snow Wednesday on a mountain highway, authorities said.

One person was trapped in the wreckage up to an hour after the 4:30 p.m. accident on heavily traveled Interstate 80 near state Highway 20 in the Sierra Nevada mountains.Authorities said most of the 24 people aboard the Amador Stage Lines bus were injured when it skidded and overturned on the way to Reno, Nev., from San Francisco during a blustery snowfall that had reduced visibility to near zero.