Damage is estimated at $20,000 in a kitchen fire at a Cheyenne residence Tuesday morning.Cheyenne Firefighters were called to 223 W. 7th Street at 10:31 a.m.The fire was contained in the wall and ceiling area of the kitchen. There was minor smoke damage throughout the house. Firefighters had the fire under control in about 15 minutes. No injuries were reported. The cause of the fire is under investigation.