No one was injured Monday morning when an empty coal train hit a tractor-trailer in Roanoke County, police said.

The train hit the tractor-trailer at the Garman Road crossing in the Glenvar area about 8:15 a.m., Sgt. Mark Jervis said.

An investigation found that the tractor-trailer was stopped on the south side of the tracks because the crossing gate was down while a crew worked at the site, Jervis said.

At some point the gate was raised and the tractor-trailer started across the tracks. It was struck by a westbound Norfolk Southern train, cutting the trailer in half, Jervis said.

Police are still investigating why the gate was raised, he said.

No one had been charged Monday.

-- Amanda Codispoti