Campbellsville Fire-Rescue was dispatched to a report of a working house fire. Upon arrival, firefighters found heavy fire conditions throughout the house, firefighters attempted to search for occupants but heavy fire conditions and structural stability concerns forced firefighters to preform exterior operations until we gained control of the fire. Firefighters extinguished the fire, provided overhaul and searched for occupants. No firefighter or civilian injuries were reported. The house was abandoned but we had reports of homeless people living inside the basement, he cause of the fire is under investigation.