Toronto Police believe two men are behind two intentionally-set house fires near Avenue Rd and Wilson Ave.
The fires, 2 km apart near Brookdale Ave and Ledbury St and then near Joicey Blvd and Esgore Dr erupted within three days of each other in late November.
Investigators believe the fires are connected.
"How they're connected I'm not able to release right now, but what we do believe is the same two people are responsible for both fires," const. David Hopkinson tells NEWSTALK 1010.
Toronto Police handout
Asked if the duo could be behind more cases of arson, Hopkinson said the possibility would need to be investigated.
While Hopkinson does not believe there was a "significant risk" of more fires being set, he thinks people living in the area should keep their eyes open for any strange behaviour.
Police want to hear from anyone who recognizes the men seen in surveillance images and from anyone who has surveillance footage of their own from near either fire.
You can call police at 416-808-3200 or contact Crime Stoppers.