Covington firefighters are still on the scene of a three-alarm fire that caused between $1 million and $1.5 million in damage to Covington Motor Co. on Tuesday.

Crews were called to the dealership in the 600 block of South Monroe Avenue just after 6:30 p.m., said Covington Volunteer Fire Department Chief Wes Walker.

They found thick smoke coming from the second floor, Walker said. Firefighters went into the building to begin fighting the blaze but were evacuated because of the dangerous conditions.

A short time later, the roof collapsed onto the second floor, which fell into the first floor, Walker said. No one was in the building.

It took firefighters two hours to bring the blaze under control, Walker said. Crews from throughout Alleghany County were called to help. Firefighters were still at the scene this morning to monitor hot spots.

The showroom, offices and storage areas suffered the most fire damage, Walker said. The garage was damaged by water and smoke.

Virginia State Police fire investigators are on the scene to determine a cause, Walker said. The fire does not appear to be suspicious, he said.