North Korean leader Kim Jong Un says he still trusts Donald Trump

North Korea's Kim Jong-un vowed he wants to give up nuclear weapons by the end of Donald Trump's first term, offering a potential timeline for denuclearization, a top South Korean official said after visiting Pyongyang.

Kim Jong un and South Korean President Moon Jae-in will meet in the North Korean capital, Pyongyang, as the North Korean leader reaffirmed his commitment towards the denuclearisation of the Korean Peninsula.

Trump's comments came after Kim reportedly said his faith in the USA president was unchanged and that Pyongyang aimed to achieve denuclearisation within Trump's first term in office, which is due to end in January 2020.

Chung added that Kim expressed his intention to work closely with the United States to achieve denuclearization "in the first official term of President Trump", which ends in January 2021.

"Chairman Kim Jong Un has made it clear several times that he is firmly committed to denuclearization, and he expressed frustration over skepticism in the worldwide community over his commitment", South Korean national security adviser Chung Eui-yong said.

After their June summit in Singapore, Trump and Kim issued a vague statement about a nuclear-free peninsula without describing when and how it would occur.

They also discussed the complex process of dialogue between Pyongyang and Washington, Efe news reported.

"Chairman Kim. expressed frustration over the doubt shown by some parts of the global society about his will", Chung said. -South Korean joint military exercises.

"He said he's pre-emptively taken steps necessary for denuclearization and wants to see these goodwill measures being met with goodwill measures", added Chung, who met with Kim in Pyongyang on Wednesday.

Kim noted the dismantlement of his country's only known nuclear test site in Punggye-ri has left the country with no means to stage any more nuclear tests. "But the work of convincing Chairman Kim to make the strategic shift which we talked about, for a brighter future for the people of North Korea, continues", he said.

Seoul says the leaders of the two Koreas will meet September 18-20 in Pyongyang to discuss how to achieve the "complete denuclearization of the Korean Peninsula". We haven't had any nuclear tests, we haven't had any missile tests, which we consider a great thing.

The North's Rodong Sinmun newspaper on Thursday said Washington must discard its "stubborn" stance that the North must denuclearise first before the United States agrees to a peace treaty.

"North Korea needs the declaration of the end of the war to convince its own officials of denuclearization", Koh said.

US officials involved in negotiations have said North Korea has refused to even start discussions about defining "denuclearization" or other key terms such as "verifiable" and "irreversible", and have insisted the United States must first agree to take simultaneous steps to reduce economic pressure.

"It is the case that there is still an enormous amount of work to do", Pompeo told a news conference on Thursday.

Mr Chung also cited Mr Kim as saying that North Korea is unable to conduct any more nuclear tests, despite several reports that the regime is secretly continuing its nuclear programme.

News 1 reported Thursday the biggest USA warship based in Asia could arrive in South Korea for joint exercises.