A Norfolk Southern freight train struck a tractor-trailer Monday morning after the rig stalled on railroad tracks in Columbia Borough, investigators said.

The driver of the tractor-trailer exited the rig before the train collided with it about 8:15 a.m., slicing the trailer in half, investigators said.

No one was injured in the collision, according to investigators.

The collision occurred on Mill Street, just east of Front Street. The tractor-trailer was believed to be headed to Columbia Borough's wastewater treatment plant.

It was unclear Monday what caused the tractor-trailer to stall on the tracks. The driver's identity wasn't released.