(KAIR)--Investigators are working to determine the cause of a fire that destroyed the transmitter building for radio station KAIR-AM.

Authorities say the fire was reported  shortly after 6:00 Wednesday morning just east of Highway 59 in Buchanan County, Missouri between Rushville and Halls.

Firefighters from Rushville and DeKalb fire protection districts found the building fully engulfed in flames when they arrived.

The Buchanan County Sheriff's Department also responded to the fire.

No one was in the building at the time of the fire and no injuries were reported.

The Missouri State Fire Marshal's office was contacted to assist with the investigation.