Rock Valley, IA (Northwestiowanow.com) — A Monday morning house fire in Sioux County has proven to be deadly. The Rock Valley Fire Department was dispatched to 2096 340th Street at 6am. The house was fully engulfed and backup was requested from Hull, Ireton, and Sioux Center.

The owner of the home – 67 year old Mike Smit – was transported to the hospital for treatment of fire-related injuries.

After the fire was out, the body of a female was found in the basement. Her identity has not been released.

The State Fire Marshal’s office is trying to determine a cause.