A night of political upheaval in South Korea has upended stability in a key democratic US ally – sending shock waves through the region and Washington at a moment of acute global tension.

US president-elect likely to encounter difficulties given the three countries’ aligned interests in challenging the West, analysts say.

By Jack Kim SEOUL (Reuters) -North Korean leader Kim Jong Un has told the Russian defence minister that Ukraine's use of long-range weapons is the result of direct military intervention by the United States and Moscow is entitled to fight in self-defence,