COLLEGE PARK, Md. (AP) — A school bus driver helped evacuate nearly two dozen children from a bus after the vehicle caught fire.

Twenty students from Glen Arden Woods Elementary School were safely evacuated Monday evening without any reports of injuries, Prince George's County Fire Department spokesman Mark Brady said in a statement.

It's not clear what caused the fire in College Park. Brady says it appears to have started near one of the back wheels of the bus before spreading throughout the rest of the vehicle.

Most parents were able to pick up their children from the scene, while the others were taken to safety by a second responding bus.

Dashcam video posted by The Washington Post http://wapo.st/2cgi3SY shows the bus engulfed in flames and heavy plumes of smoke.