US VICE-PRESIDENT Mike Pence vowed yesterday to impose the “most aggressive sanctions yet” on North Korea over its nuclear weapons programme.

Mr Pence, who is on a six-day tour of Asia, spoke in Tokyo alongside Japanese Prime Minister Shinzo Abe. Tomorrow he will attend the opening ceremony of the Winter Olympics in Pyeongchang, South Korea.

The two Koreas have used the Games as an opportunity for reconciliation, with North Korea sending a large delegation.