Officials believe arson was the cause of last month’s fire that destroyed the historic Firestone mansion in Beaver Township, Ohio.

While the investigation is ongoing, the state fire marshal’s office does suspect arson, according to local news reports.

The fire broke out at the building around 4 a.m. Oct. 21. The age of the house was a factor in flames moving through the structure so quickly, fire officials said. Only a few walls remained standing once all the flames were extinguished.

According to a report in The (Youngstown) Vindicator, the two-story, 2,720-square-foot home was built at its original site, adjacent to the Firestone tire-testing facility, in 1880 by the Lower family, relatives of Harvey Firestone. Firestone maintained the property for about six years before the current owners purchased it.

At the time of the fire, the house was listed for sale; no one was living in the home.