Seoul will raise the issue of a South Korean citizen who has been held incommunicado in North Korea for over three months during the ASEAN Regional Forum in Thailand later this month.

Foreign Minister Yu Myung-hwan told reporters Thursday the issue will have to be brought to the international forum.

Last year, Seoul took the issue of a South Korean tourist shot to death in the North's Mt. Kumgang resort to the ASEAN forum.

The foreign minister also said consultations among the five members of six-party nuclear talks excluding North Korea on the sidelines of the forum are unlikely.