(L-R) Yun Kun-young, a South Korean Blue House official, Chun Hae-sung, vice unification minister of South Korea, Chung Eui-yong, top national security adviser of the Blue House of South Korea, Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), Suh Hoon, chief of the National Intelligence Service (NIS) of South Korea, NIS deputy chief Kim Sang-gyun and Kim Yong Chol, vice chairman of the Workers' Party of Korea (WPK) Central Committee and director of the United Front Department of the DPRK, pose for a photo in Pyongyang, DPRK, on Sept. 5, 2018. South Korean President Moon Jae-in's special envoys met Wednesday with Kim Jong Un in their one-day visit to Pyongyang, the presidential Blue House of South Korea said. (Xinhua/South Korea Presidential Blue House)

SEOUL, Sept. 6 (Xinhua) -- Top leader of the Democratic People's Republic of Korea (DPRK) Kim Jong Un reconfirmed his firm commitment to the complete denuclearization of the Korean Peninsula, a South Korean presidential special envoy said Thursday after visiting Pyongyang the previous day.

Chung Eui-yong, South Korean President Moon Jae-in's top national security adviser who led the five-member special delegation, told a press briefing that the DPRK leader reconfirmed his firm commitment to the denuclearization of the peninsula during his meeting with the South Korean special delegation.

Chung and four other delegates met Kim in Pyongyang Wednesday during their one-day mission as special envoys, delivering Moon's letter to the DPRK leader.

Chung said the DPRK leader expressed his willingness to closely cooperate with the United States as well as South Korea for the complete denuclearization.

He noted that the two Koreas agreed to hold the third Moon-Kim summit in the DPRK's capital city from Sept. 18-20.

To discuss protocol, security, communications and media coverage for the upcoming summit, the two sides agreed to hold a high-ranking working-level meeting early next week at the border village of Panmunjom.

During the upcoming summit, Moon and Kim would discuss practical measures to denuclearize the Korean Peninsula, as well as issues on the permanent settlement of peace and co-prosperity on the peninsula and the implementation of the Panmunjom Declaration, which the two leaders signed after their April summit.

The two Koreas, the special envoy said, agreed to keep advancing the ongoing dialogues to defuse military tensions along the inter-Korean border, and to reach an agreement at the upcoming summit on concrete measures to build mutual trust and prevent military clashes.

Seoul and Pyongyang also agreed to open a joint inter-Korean liaison office, where representatives of the two sides reside, before the third Moon-Kim summit is held, while continuing necessary cooperation for it.

The two Koreas already completed necessary preparations, including construction and ways to jointly form and run, to open the joint liaison office at the DPRK's border town of Kaesong.

Chung said South Korea will brief the countries concerned, including the United States, in detail on the outcome of the special envoys' visit to Pyongyang, and closely cooperate with them.

He added that the two Koreas will make consistent efforts, with patience, to develop inter-Korean ties, denuclearize the peninsula and build peace.