"South and North agreed to hold the inter-Korean summit from September 18 to 20 in Pyongyang, and to hold working-level talks at Panmunjom next week", Chung said.
"Chairman Kim Jong-un has made it clear several times that he is firmly committed to denuclearisation, and he expressed frustration over skepticism in the global community over his commitment", Chung Eui-yong, Mr. Moon's National Security Advisor and the head of the South Korean delegation to Pyongyang, told reporters on Seoul on Thursday.
"Chairman Kim. expressed frustration over the doubt shown by some parts of the global society about his will", Chung said. Mr. Kim said he'd take "more active" measures toward denuclearisation if his moves are met with corresponding goodwill measures, Mr. Chung said.
North Korean leader Kim Jong Un has renewed his commitment to denuclearisation and promised to cooperate with the United States in talks, according to a South Korean envoy who met him in Pyongyang.
North Korean leader Kim Jong-un and U.S. President Donald Trump held a landmark summit in Singapore in June, in which they agreed to work toward complete denuclearization.
"He particularly emphasized that he has never said anything negative about President Trump", Chung said. North Korea has taken several steps such as dismantling its nuclear testing site this year, but the US wants it to take more serious disarmament measures.
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He says the Koreas will hold talks next week to prepare for the summit.
Kim's remarks to South Korean officials mark the first time that the North Korean leader has offered a potential timeline for dismantling his country's nuclear weapons programme. But negotiations have made little headway, while signs North Korea has maintained work on its weapons have emerged.
"A liason office between the North and South will also be established", he said. Trump recently urged Secretary of State Mike Pompeo to cancel his summit with the dictator.
Pyongyang wants the United States to agree to formally end the Korean War, which concluded in 1953 with an armistice, not a peace deal, and reiterated its demand on its foreign ministry website this week.
But American officials and conservatives in the South are concerned such a declaration would weaken the US-South Korea alliance and deprive the 28,000 US forces stationed on the peninsula of their deployment rationale.
Kim was paraphrased in the statement by his propaganda specialists as saying that it was "his will to completely remove the danger of armed conflict and horror of war from the Korean peninsula and turn it into the cradle of peace without nuclear weapons and free from nuclear threat".
While an end-of-war declaration wouldn't imply a legally binding peace treaty, experts say it could create political momentum that would make it easier for North Korea to steer the discussions toward a peace regime, diplomatic recognition, economic benefits and security concessions.