ST. CATHARINES, Ont. – Arson may be the cause of a Saturday night fire that left an unoccupied house with up to $100,000 in damage, Niagara Regional Police said.

Regional Police and St. Catharines Fire Services responded to a report of a fire at 9:30 p.m. at 73 Queen St. Firefighters put out the fire and learned the building was unoccupied, police said.

The fire caused between $50,000 and $100,000 in damage, police said, and an unknown person was seen near the property before the fire. Anyone with information should call the Niagara Regional Police at 905-688-4111 ext. 4233.