MISSISSAUGA, Ontario (AP) — Canadian authorities investigating an alleged homegrown plot to blow up buildings in Ontario said Monday more arrests were possible as part of a wider probe into terrorist cells in at least seven countries, including the United States. A U.S. law enforcement official said investigators are looking for connections between the 17 detained in Canada and suspected Islamic militants in custody in the United States, Bangladesh, Bosnia, Denmark, Great Britain and Sweden. Separately, a U.S. counterterrorism official said there wasn’t any reason to believe there were targets in the United States but also no reason to be...