South Korea’s Chung Eui-yong, the US' H. R. McMaster, and Japan’s Shotaro Yachi met to discuss North Korea and the denuclearisation of the Korean peninsula.
The two days of meetings could also help prepare the way for a possible meeting between US President Donald Trump and North Korean leader Kim Jong Un.
China's foreign minister urged the United States and North Korea Thursday to start talks as soon as possible, stressing that "the sincerity" of all parties to solve the nuclear crisis would be tested.
North Korea is willing to hold talks with the United States on denuclearisation and will suspend nuclear tests while those talks are under way, says Seoul.
Kim Yong Chol will lead a high-level delegation at the closing ceremony of the Winter Olympics in Pyeongchang on Sunday.
According to the Washington Post, the US veep says Washington would be open to possible talks, signalling that diplomatic options were still on the table.
They also say South Korea could find itself in a tight spot, sandwiched between its desire to improve ties with Pyongyang and to work with Washington to denuclearise the North.
We need to peacefully resolve North Korea's nuclear issue.
South Korea's unification minister says Seoul was reiterating its willingness to hold talks with the North 'at any time and place in any form'.