The United States' new top envoy for North Korea was scheduled to meet counterparts from South Korea and Japan during a visit to Seoul on Monday, amid an impasse in denuclearisation talks with Pyongyang.

US special representative for North Korea, Sung Kim, is in South Korea for a five-day visit, with no word of any planned efforts to contact the North.

Kim, who doubles as ambassador to Indonesia, had back-to-back meetings scheduled with South Korea's top nuclear envoy, Noh Kyu-duk, as well as a trilateral session...