"I once again urge the community of nations to mobilize its strengths for the end-of-war declaration on the Korean Peninsula," Moon said in a speech to the annual gathering of the world body, as quoted by Reuters.

"I propose that three parties of the two Koreas and the US, or four parties of the two Koreas, the US and China come together and declare that the War on the Korean Peninsula is over," he said.

North Korea had long sought a formal end to the Korean War to replace the armistice that stopped the fighting but left it and the United States-led United Nations Command still technically at war.

Moon, who has been active in trying to engage with North Korea throughout his presidency, has argued that such a declaration would encourage North Korea to give up to denuclearize. Washington has said Pyongyang must give up its nuclear weapons first.

Earlier on Tuesday, US President Joe Biden addressed the UN assembly and said the US sought "serious and sustained diplomacy to pursue the complete denuclearization of the Korean Peninsula."

"We seek concrete progress toward an available plan with tangible commitments that would increase stability on the Peninsula and in the region, as well as improve the lives of the people in the Democratic People’s Republic of Korea," he said, using North Korea's official name.

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