A fire in a drug rehabilitation center killed 12 people and injured at least three others, authorities in the Mexican state of Guanajuato said Sunday.

Ontario and Saskatchewan have signed an agreement to remove trade barriers ahead of a meeting with Prime Minister Mark Carney to hash out a plan they hope will supercharge the economy.

Canada Post has rejected a request from the union representing about 55,000 of its workers to send their ongoing labour dispute to binding arbitration.