Countries are acting swiftly to isolate regions where COVID-19 variants of concern have emerged. Many scientists are not convinced that travel bans actually work. Some say bans encourage countries to downplay outbreaks or hide new variants. Others say bans can buy time.

The White House says it has no immediate plan to tighten the border with Canada again after new COVID-19 cases involving the omicron variant.

A 15-year-old student opened fire at his Michigan high school about 50 kilometres north of Detroit Tuesday, killing three students and wounding six people, including a teacher.

Quebec City's police department says it's suspended five of its officers who were involved in the violent detention of two young Black people over the weekend.

The head of Alberta’s police watchdog agency has resigned, signalling what critics say is a long-foreshadowed breakdown in the chronically underfunded agency.

A longtime pilot for the late financier Jeffrey Epstein resumed his testimony at Ghislaine Maxwell's sex-trafficking trial Tuesday, saying that the British socialite charged with helping the financier find teenage girls to sexually abuse was "Number 2" in the hierarchy of Epstein's operations.

Canada's telecommunications regulator is bringing in new laws that will force phone companies to do a better job of identifying who is calling to help users inundated by nuisance phone calls from telemarketers.

Authorities searched the home of musician Marilyn Manson, whose legal name is Brian Hugh Warner, on Monday after allegations of physical and sexual abuse by several women.

Canadian troops in the Baltic state of Latvia are just 300 kilometres from the border with Russia, as tens of thousands of Russian troops mobilize and take a combat-ready stance to the south. On a visit to the base, some told CBC News they're keeping a close eye on developments.

There could be more rainfall than snow in the Arctic in as little as 30 years because of the world's changing climate, according to a new study that predicts the transition will happen decades earlier than previously anticipated.