U.S. National Security Advisor John Bolton will reportedly visit South Korea this week, ahead of the second North Korea-U.S. summit.
CNN on Wednesday cited two Trump administration officials in its report, but U.S. National Security Council Spokesman Garrett Marquis said they have "nothing to announce right now."
It's unclear why Bolton might visit Seoul and who he would meet.
But as the potential visit comes amid officials from Pyeongyang and Washington hammering out the details of the summit, it's expected Bolton would hold talks with senior South Korean officials on the matter.
Bolton attended last year's Singapore summit and was at the table for President Trump's discussions with Kim Jong-un and other North Korean officials.