The National Post says the Canadian terror arrests are linked to investigations in at least six other countries: Alleged Ontario terror plot has worldwide links. (Hat tip: Allahpundit.)

TORONTO - A Canadian counter-terrorism investigation that led to the arrests of 17 people accused of plotting bombings in Ontario is linked to probes in a half-dozen countries, the National Post has learned.

Well before police tactical teams began their sweeps around Toronto on Friday, at least 18 related arrests had already taken place in Canada, the United States, Britain, Bosnia, Denmark, Sweden, and Bangladesh.

The six-month RCMP investigation, called Project OSage, is one of several overlapping probes that include an FBI case called Operation Northern Exposure and a British probe known as Operation Mazhar.