Rockford Fire Department says a garage was damaged after a semi-tractor caught fire Sunday morning.
Firefighters responded to the 1500 block of Montague Street around 9:30 a.m
When crews arrived on scene, they found heavy smoke coming from a large, detached garage.
Inside, firefighters say they found flames coming from the engine compartment of a semi-tractor.
Fire officials say there were horses in a nearby structure. Firefighters were able to extinguish the fire, while also keeping smoke and flames away from the animals.
The fire did approximately $40,000 worth of damage.
Rockford Fire says no animals or humans were hurt.
Investigators say the fire was accidental.