Investigators are still trying to determine the cause of the fire.
This is an update of a story posted at 6:59 p.m.
PALMER - Fire destroyed a mobile home at 249 Ware St. (Route 32) and sent two of the occupants to the hospital.
The fire was reported just after 6:30 p.m. Saturday, and Palmer firefighters were assisted by Three Rivers, Bondsville and Ware fire departments at the scene. Monson firefighters provided station coverage.
Palmer Fire Chief Alan J. Roy said the mobile home was "fully involved" when firefighters arrived, and said explosions could be heard. Trooper Michael Mazza, of the state fire marshal's office, also arrived at the scene to investigate.
"It was a pretty stubborn fire. It took about a half hour to knock it down. There were a lot of contents in that building," Roy said.
Police and Roy said the tenants, Donald Brooke and his wife, were brought to Wing Memorial Hospital for treatment of possible smoke inhalation and burns. According to town property records, the home is owned by Robert Boucher of Florida.
Roy said it is unknown what caused the fire.