(AP) — A Lincoln firefighter’s house has been damaged by a chimney fire.

Battalion Chief Dennis Clark says the firefighter had trouble with smoke not venting from a fire he’d built in his fireplace on Saturday. He put out the fire in the fireplace but heard crackling behind a chimney wall. The firefighter called 911 a little after 2 p.m., and his colleagues soon arrived to put out the blaze.

Damage was estimated at $20,000.