North Korea-U.S. tensions are not Mexico's business: diplomat

North Korea's ambassador to Mexico on Friday said its tensions with the United States were not Mexico City's business after President Enrique Pena Nieto ordered that he leave the country in protest over Pyongyang's nuclear tests.Mexico on Thursday said it had given the ambassador, Kim Hyong Gil, 72 hours to leave Mexico in order to express its "absolute rejection" of North Korea's recent nuclear activity, describing it as a grave threat to the region and the world.