ORANGE CITY, Iowa (AP) – Authorities say three firefighters have suffered minor injuries while putting out a house fire in northwest Iowa.  Sioux County authorities say the fire was reported about 2:05 p.m. Thursday in Orange City.

Investigators suspect the fire was started by a malfunction in a radiant heat system. The blaze was difficult to battle because it was burning in the house attic.  The residents weren’t home. The three firefighters were taken to Orange City Hospital for treatment and then released.