BRISTOL — Fire destroyed a home at 16 Oceanside Lane off Pemaquid Point Road in Bristol early this morning, sending its two occupants to Miles Memorial Hospital with injuries that were not life-threatening.

Neighbors called the fire department at 3 a.m. when they heard what sounded like an explosion, said Fire Chief Paul Leeman. The fire appears to have started in the two-story garage and spread to the attached house. The residents were outside when firefighters arrived, he said.

No firefighters were injured.

The fire destroyed the building, with the structure ultimately collapsing into the cellar hole, Leeman said. Firefighters brought the fire under control in about an hour and spent several hours using an excavator to get at hot spots to keep it from flaring up, he said.

Investigators with the state Fire Marshal’s Office are working to determine a cause, he said. Leeman said he could not provide details about the occupants or their condition.

The house is owned by John and Lynn Ring and was valued by the town at $194,400, according to town records.