The massive Canadian wildfire that displaced thousands of people in Alberta has officially spread to neighbouring Saskatchewan.

Shots ring out at a school in western Canada, leaving four people dead and several others critically injured in the nation's worst such shooting in a quarter of a century. "Obviously, this is every parent's worst nightmare," said Prime Minster Justin Trudeau.

“Canadians have chosen change. Real change,” Trudeau said during his speech at his campaign headquarters in Montreal.