Brownwood firefighters responded to a small fire in the Kohler Co. maintenance shop Thursday morning.

A sprinkler activated and extinguished the fire before the fire department arrived, Brownwood Fire Marshal Buddy Preston said.

The fire began around 5 a.m. on a work bench, and the only damage occurred to the bench and a storage cabinet, Preston said.

Tools, rags and materials were on the bench, and while the cause of the fire is not known for sure, it likely was caused by some kind of chemical reaction from the items on the bench, Preston said.