Could there be a fiery turf war erupting between the Toronto Mafia and their brethren in Montreal?

Montreal police say that's one hypothesis they're examining as they probe a rash of firebombings that have targeted mainly Italian establishments in their city.

Deputy police chief Jacques Robinette, head of special investigations, says the last arson incident was Jan. 25 but there's no evidence the attacks are over.

Police are examining several theories, including one pittiing Montreal's mobsters versus Toronto's.

They say Calabrian Mob groups based in Toronto could be trying to gain a foothold against Montreal's destabilized ruling Sicilian clan. The Rizzuto family has been hit with a succession of legal woes, and the son of reputed boss Vito Rizzuto was recently gunned down.

Robinette says no theory has been discounted.