The total number of cars torched in Welland has reached five.
Welland fire officials are looking into the vehicle fires in the area of Hagar and Burgar Streets.
Deputy Chief Adam Eckhart tells CKTB the fires were first reported on January 4th and have continued.
The fires have been set in the overnight hours in scrapped cars.
Eckhart is asking residents in the area to lock their vehicles, and any outdoor buildings to ensure their property is safe.
He says all cases are considered suspicious and police continue to investigate.