Suffolk County Police Arson Section detectives are investigating a house fire that seriously injured a man in Copiague this afternoon.

First Precinct officers responded to a home, located at 302 Deauville Blvd., after a 911 caller reported a fire at the location at approximately 2:50 p.m. Members of the Copiague Fire Department entered the house and found an adult male unconscious.

The man, who has not been identified, was transported via ambulance to Nassau University Medical Center in East Meadow in critical but stable condition. He was the only person inside the house at the time of the fire.

The cause of the fire is under investigation.