SLIPPERY ROCK TWP — A fire Sunday afternoon that damaged a township house is not suspicious.

Dave Taggart, chief of the Slippery Rock Volunteer Fire Company, said the fire likely started inside the walls or ceiling of the house and spread.

“It was an electrical problem,” Taggart said.

A state police fire marshal was not called to the house.

The fire broke out at 3:30 p.m. and firefighters were at 115 Lutes Lane until about 6 p.m.

The fire destroyed the interior of the house, owned and occupied by Kenneth Lutes, but left the exterior mostly in tact. Taggart said the fire caused about $25,000 in damage.

“I believe it’s still fixable,” Taggart said.

He said that Lutes did not have insurance.

Lutes and his family were home when the fire broke out, but no one was injured. They are staying with relatives.

Firefighters from Harrisville and Unionville assisted Slippery Rock firefighters. About two dozen firefighters put the blaze out.