York Regional Police have identified a suspect in more than a dozen arsons in Thornhill.
Between April 21 and 25 and May 5 and 12, there were several fires involving grass clippings and yard waste left at the end of driveways.
The fires, which appear to have been intentionally set, started in the early morning.
Residents are beings asked to keep an eye out for any suspicious activity; especially those who live on the following streets: Lunau Lane, Lindemann Street, Lambert Road, Green Lane, Bayview Avenue, Ravencliffe Road, Willowbrook Road and Huntington Park Drive.
The suspect is described as a white male in his late teens or early 20s.
Anyone with information, is urged to call police at 1-866-876-5423, ext. 7241, Crime Stoppers at 1-800-222-TIPS or leave a tip at www.1800222tips.com