Police in Canada have arrested 12 adults and five young people in a massive anti-terrorist sweep in the Toronto area.The group were said to have amassed explosives to use in attacks on targets in southern Ontario. The terrorist suspects were taken in unmarked cars overnight to the city of Pickering, east of Toronto. Assistant police commissioner Mike McConnell warned: “We must remain vigilant. Canada is susceptible to criminal terrorist activity as much as any other country. Reducing the threat of terrorism is one of our top priorities.” Though believed to be inspired by Islamist terrorists, the suspects are not believed to have any links to al-Qaeda. They are all citizens or residents of Canada and come from a variety of backgrounds. Some of them are teenagers. Media reports said the group had planned attacks on buildings in central Toronto.