There is speculation that North Korea might conduct a long-range missile test today to mark the 72nd anniversary of the founding of the ruling Korean Workers' Party, raising tensions on the Korean peninsula.
This came after US President Donald Trump's comments, which were viewed as hinting at military action.
Russia and China, the North's closest allies, yesterday made urgent calls for restraint.
Ahead of the party's anniversary, North Korean leader Kim Jong Un promoted his younger sister to the party's politburo. Ms Kim Yo Jong, 28 and four years her brother's junior, is said to be behind his carefully crafted public image.
