Authorities in Omaha say a carelessly discarded cigarette is to blame for a minor house fire.

The Omaha Fire Department says the fire began Wednesday on the house’s front porch. It extended up into the attic space.

The fire was under control within minutes. The house received little damage in the living area.

Authorities say three people in the house at the time escaped. No injuries were reported.

Damage is estimated at about $20,000.