Nepal, Jan. 22 -- High-level talks aimed at clearing the way for a second U.S.-North Korea summit are under way, raising hopes that the two sides can break their stalemate over denuclearisation of the Korean peninsula. Secretary of State Mike Pompeo is expected to meet former North Korean spy chief Kim Yong Chol at a Washington hotel on Friday. The meeting will likely be followed by a Kim visit to the White House, where he could meet with Trump, according to two officials, who were not authorized to discuss the matter publicly and spoke Thursday on condition of anonymity.

The visit is a sign of potential movement in a diplomatic process that has struggled for months and, according to the source, could yield an announcement of plans for a...