STERLING, Colo. -- At 2:30 a.m., Sterling Dispatch received multiple reports of a fire on the roof of Nichols Tillage Tools.

Sterling Police officers at the scene confirmed a working fire on the roof. Due to the confirmed working fire and the size of the structure, Merino Fire was called for mutual aid.

First arriving fire units located a fire in a vent and quickly extinguished it.

Crews laddered the roof to check for extension and cleared at 4 a.m.