About 36 hours after members of Outlaws Motorcycle Gang clashed with a rival group, their clubhouse was reduced to a pile of charred rubble.
The fire in Brockville also damaged nearly a dozen buildings, CBC reported.
Asked if the incidents were related, Brockville Staff Sgt. Darryl Boyd said: "Absolutely."
The fire destroyed a nearby building as well as damaging about eight to 10 residences.