They now believe a suspended heating unit started the fire. Fire Chief Doug Hamilton said components that feed the natural gas failed.
Seventy-five firefighters from 13 different agencies were called to fight the fire on the Gallatin town square. It took nearly three hours.
One building was a total loss. Another suffered extensive damage and several others on the block had smoke and water damage.
The total damage is estimated at $300,000.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.