— Events in Toronto involving Prime Minister Stephen Harper, his wife Laureen, and Nobel Peace Prize co-winner Malala cancelled.
— New Brunswick shuts its legislature for the day; Quebec closes its national assembly to the public; security beefed up at other legislatures.
— Off-duty Canadian soldiers told not to wear uniforms in public; military bases across the country locked down or put on alert.
— NHL game between Senators and Maple Leafs in Ottawa postponed.
— Numerous buildings in Ottawa locked down.
— Toronto police beef up presence at some public facilities.