A manufactured home on Crosby Avenue was mostly destroyed in a structure fire shortly after midnight Monday, according to North Whidbey Fire and Rescue Chief Mark Kirko. The two adult residents inside at the time were able to exit the building without injuries, and no firefighters were injured during the response, he said.

The call came from someone who saw flames from across the street. The fire spread into the attic and shorted the wires attached to the home’s smoke detectors, which shorted the devices before they could go off.

The homeowners awoke after hearing glass breaking and went to investigate what they thought was a home invasion, Kirko said.

The residents saw flames outside though the glass above their front door and were able to leave through the back door.

The home’s two occupants unsuccessfully tried to manage the fire with a fire extinguisher and garden hose once outside, he said.

The roof was almost fully engulfed in flames by the time firefighters arrived.

There were 17 North Whidbey Fire and Rescue firefighters, approximately eight from the Oak Harbor Fire Department and four or five from the Navy who responded, he said.

At the time of this writing, an investigation was still in the process, but he said the cause of the fire seems to be unintentional.

“There’s no reason to think otherwise,” he said.