CARTHAGE (AP) - An early-morning collision between a passenger bus and a tractor-trailer in East Texas has left two dead and injured at least four others.

Texas Department of Public Safety Trooper Jean Dark says the collision occurred shortly before 1 a.m. Thursday just north of the Panola County town of Carthage.

Dark says the bus driver and one passenger were killed in the wreck. Three other passengers were taken to a hospital in Carthage. The driver of the tractor-trailer was airlifted to a Tyler hospital.

She says the bus was traveling from Houston to Chicago.

KETK-TV in Tyler reports the El Expreso bus was attempting a U-turn after the driver learned a passenger was left behind at a prior stop. The bus then collided with the truck.