North Korea reopened a border hotline with Seoul on Wednesday to discuss sending a delegation to the Winter Olympics in South Korea's Pyeongchang next month.

Should the North attend the event, the two Koreas may march under a single flag at a sports opening ceremony for the first time in more than a decade and even compete as a single nation, experts and officials have suggested.

Such a move would be a powerful symbol of reconciliation amid a tense standoff over Pyongyang's defiant pursuit of nuclear and missile programs.