A fire in the Rehoboth Bay Mobile Home Park at the end of Old Landing Road near Rehoboth Beach caused $75,000 damage to three homes and spread to burn about 100 acres of nearby marsh and woods, according to the Delaware State Fire Marshal’s Office.

One of three homes received significant damage while two homes on each side received minor damage.

When firefighters arrived at the G Street residence around 10:30 a.m., heavy fire was showing. The fire caused two propane tanks to vent and fuel the fire, officials said. It also helped spread the fire to the nearby marsh that nearly surrounds the mobile home park.

The mobile home was occupied at the time of the fire and the occupants and neighbors were able to escape the blaze. No injuries were reported. The fire was placed under control at approximately 11:22 a.m., but units remained on the scene to extinguish fire hot spots in the marsh. Four adults are being assisted by the American Red Cross with housing and other items, officials said.

The State Fire Marshal’s Office has determined the cause of the fire to be accidental caused by an electrical malfunction.