It took Riverside firefighters 20 minutes to put out flames in the attic of a single-story house Sunday evening.
The fire was reported at 6 p.m. in the 10400 block of Killarney Drive, said Riverside Fire Department Battalion Chief Mike Allen. The flames were out at 6:20 p.m.
No firefighters or civilians were injured, Allen said.
The cause of the fire was under investigation.