South Korea's President Moon Jae-in met with his North Korean counterpart Kim Jong Un on Saturday to follow up on last month's summit.
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The meeting took place just north of the border, exchanging views primarily on the possible summit between North Korea and the United States, which remains at risk of not taking place as U.S. President Donald Trump wavers.
They also discussed implementing the April 27 Panmunjom Declaration, which had declared a mutual will to work toward peace and decnuclearization.
Suh Hoon, chief of the South Korean National Intelligence Service and Kim Yong Chol, vice chairman of the Workers' Party of Korea Central Committee and director of the United Front Department of the DPRK, attended the meeting.
Moon will announce the full outcome of his two-hour meeting with Kim on Sunday morning local time, officials said.
Trump earlier this week canceled the much anticipated meeting between him and Kim, but a day later said the meeting could possibly be reinstated after holding talks with North Korean officials.
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Trump canceled the meeting over what he called the "tremendous anger and open hostility" in Pyongyang's recent statements.
Meanwhile, North Korean officials were angered by continued U.S.-South Korean military exercises, and references by U.S. officials that they would like to see a 'Libya model' of denuclearization implemented in Korea.
Despite Trump's cancellation, North Korea's First Vice Foreign Minister Kim Kye Gwan said his country was ready to sit down with the United States anytime to work out problems in a diplomatic manner.
Russia's President Vladimir Putin met with his Japanese counterpart on Saturday, and called for all countries to exercise "restraint" in the Korean peninsula so as to encourage peace.
China, which has held high-level meetings with Kim Jong Un and other Korean officials in recent months, has also expressed hope that a successful U.S.-North Korea summit will take place.
As part of the Panmunjom Declaration, North Korea has already dismantled its nuclear test site in the northeastern part of the country.