LocalNews8.com

REXBURG - Fire crews in Rexburg had a bit of a mess on their hands late Sunday night.  They were called out to a fire around 11 at Mountain West Products, just off of Yellowstone Highway.  

Nobody was at the building last night, but someone on a bike riding by the shop saw the fire and called it in.

Firefighters arrived quickly and were able to contain the flames to just three rooms of a modular extension of the office building.

Firefighters say the fire was started by a heater. They assume it was dust that got hot and sparked flames.