"We plan to hold a working group session twice a month if possible," a government official told reporters on the customary condition of anonymity. "There will be some flexibility."

If there's no special issue to discuss, the two sides may skip a session, he added.

The working group is intended to focus on four main issues: diplomacy on North Korea, denuclearization, inter-Korean ties and the implementation of UN sanctions.

It involves officials from the presidential offices and foreign ministries of the two sides as well as South Korea's unification ministry in charge of inter-Korean cooperation.

South Korea's team will be led by Lee Do-hoon, special representative for Korean Peninsula peace and security affairs at the Ministry of Foreign Affairs. His counterpart is Stephen Biegun, special representative for North Korea at the State Department.

The inaugural session of the working group took place in Washington DC on Tuesday (local time), as Lee's team traveled there.

The two sides plan to exchange visits to each other's capital, as many as possible, and to use videoconferencing if needed, another official said. (Yonhap)