Kim Jong-un has pledged a "new history" in relations with his neighbour as he became the first North Korean leader to set foot in South Korea since the end of the Korean War in 1953.
North Korea agreeing to discuss denuclearisation "is evidence that President [Donald] Trump's strategy to isolate the Kim regime is working," US Vice-President Mike Pence has said.
The influential sister of North Korean leader Kim Jong-un is to attend Friday's opening ceremony of the Winter Olympic Games, which are being held in the South, ministers in Seoul say.