Kentucky State Police are investigating a fire in western Kentucky in which three people have been found dead and another injured.

Police say investigators are on the scene of the residence in southern Trigg County near the northwestern edge of the sprawling Fort Campbell military post.

A police statement Thursday morning says the condition of the injured person is unknown.

Other agencies referred questions to state police, and the county coroner was not available early Thursday.

No names have been released pending notification of family.

The cause of the fire is under investigation.