SEOUL-- South Korea's vice unification minister departed to the United States on Sunday for a six-day visit to discuss North Korea's nuclear issue, the ministry said.

In Washington, D.C., Vice Minister Chun Hae-sung will meet with U.S. Special Representative for North Korea Policy Joseph Yun and Sen. Ed Markey (D-MA), to explain Seoul's North Korea policy and call for U.S. cooperation, according to ministry officials.

Chun also plans to give a key note speech to a forum on the Korean Peninsula issue

He will then fly to New York to meet with officials from the United Nations Population Fund (UNFPA) and the U.N. Children's Fund (UNICEF) on Thursday.

Humanitarian assistance to North Korea is likely to be the main subject of the New York meetings as South Korea is weighing possible financial supports for UNFPA's 2018 survey of the North Korean population. Seoul has approved a plan to offer $8 million in aid to North Korea via UNICEF and the World Food Programme although the timing of the assistance has yet to be determined.

Chun will also meet with experts on Korean issues, according to the officials.

Source: Yonhap News Agency