After two weeks of relative calm, tens of thousands of students were back on the streets of Quebec Friday to protest a hike in tuition fees in the eastern French-speaking Canadian province.

A demonstration in Montreal drew up to 15,000 people, while another 5,000 protested in Quebec City, according to police and Agence France Presse estimates.

Immigration Minister Jason Kenney introduced legislation in the House of Commons Wednesday that would tighten conditions for foreigners entering Canada and aimed mainly at "foreign criminals."

The measure calls for the automatic expulsion of political refugees and both permanent and temporary residents who commit a crime and are sentenced to more than six months prison.

Three employees of an armored car company were shot dead and a fourth person was wounded early Friday at the University of Alberta in the western Canadian city of Edmonton, according to local media.

An Edmonton police officer told Agence France Presse that "shots were fired" but declined to provide further details, saying a statement would be released later.

At least 25 people were arrested late Saturday after hundreds took to Montreal's streets, protesting against plans to raise tuition fees -- as well as against Canada's hosting of the Formula One Grand Prix.

The march began peacefully, with some of the 500 protesters banging pots and pans and some wearing carnival masks.

Canada said Tuesday it was moving to ban the main substance used to make "bath salts" -- the drug linked to a grisly attack in the United States in which a man almost killed another by chewing his face.

The drug -- which as its name suggests resembles regular bath salts in texture -- can spark an often aggressive, chaotic experience for users, including intense hallucinations.

A wild black bear attacked a man relaxing in a hot tub at the Whistler ski resort in western Canada, with a swift whack to the head, police said Monday.

The 55-year-old man from Coquitlam, British Columbia, "felt a heavy blow to the back of his head which propelled him forward in the hot tub" on Saturday, Royal Canadian Mounted Police Staff Sergeant Steve LeClair said in a statement.

Australian and Japanese dominated Sunday's final day of the Santa Clara Invitational swim meet with three triumphs for each nation in preparation for next month's London Olympics.

Aussie veteran Leisel Jones won the 100-meter breaststroke in 1:07.37, 1.08 seconds ahead of American Alia Atkinson, with Aussie Sarah Katsoulis third in 1:09.08.

A gunman opened fire Saturday in a busy food court at one of Canada's best known shopping malls, Toronto's Eaton's Centre, killing a 25-year-old man and leaving seven others injured, police said.

"The nature of the wounds indicate this individual was targeted," said Toronto police chief Bill Blair. "The others were innocent bystanders."

Major Western powers said Tuesday they would expel Syria's diplomatic envoys in protest at the weekend massacre in the town of Houla, in which more than 100 people were killed.

The United States, Britain, France, Germany, Italy and Spain as well as Canada, Australia, The Netherlands, Bulgaria, Switzerland and Belgium announced decisions to expel ambassadors or top envoys.

A Chinese immigrant who beheaded and cannibalized a Canadian bus passenger in front of horrified travelers four years ago spoke out for the first time Tuesday, saying he believed his victim was an alien.

Vince Weiguang Li, 43, after being diagnosed with paranoid schizophrenia, was found not guilty of murdering 22-year-old Tim McLean on a Canadian Greyhound bus on July 30, 2008.