FLAGSTAFF, Ariz. (AP) _ A Greyhound bus collided with a truck this morning in northern Arizona, injuring 14 people, officials said.

The bus, northbound on Interstate 17, was carrying 41 people plus a driver, said Katherine Williams, a Greyhound spokeswoman in Dallas. It was headed from Phoenix to Salt Lake City, she said.

Fourteen people were injured, two of them seriously, said Kathy Dean, a spokeswoman for Flagstaff Medical Center.

The bus was heading up a long, winding, steep grade about 30 miles south of Flagstaff when it ran into the rear of the truck, Williams said. She didn't know if the truck was stopped or was moving slowly.

The truck was hauling cars, said Officer Jim Harnack in the state Department of Public Safety duty office.

No other details were immediately available.