Fire officials are working to determine what started a fire in a house and shed in Burlington on Tuesday morning.
Crews responded to 33 Main Street around 7:30 a.m. for a smoke investigation.
Firefighters said when they arrived, they recognized a structure that was on fire and fully involved.
According to fire officials, a home and a shed caught on fire. The flames spread through the first and second floors of the house.
Witnesses said they heard explosions, which the fire chief said could have been small propane tanks in the house.
Nobody was inside either structure at the time of the fire, officials added.
Fire officials said there are no hydrants in the area which caused challenges while trying to get water to fight the flames.
Mutual aid from Avon, Bristol, Canton, Harwinton and Unionville responded to help Burlington firefighters.
No injuries were reported.
The cause and origin of the fire remains under investigation by the state and local fire marshals.