North Korea's nuclear test site will close in May, the South Korean president's office has said.
A spokesman said the closure of the Punggye-ri site would be done in public and foreign experts from South Korea and the US would be invited to watch.
On Friday, North Korean leader Kim Jong-un and South Korea's President Moon Jae-in agreed to work to rid the Korean peninsula of nuclear weapons.
Their summit came after months of warlike rhetoric from the North.
On Saturday, US President Donald Trump he would likely hold talks with the North Korean leadership "over the next three or four weeks" about the denuclearisation of the peninsula.
Presidential spokesman Yoon Young-chan said that Mr Kim had stated he "would carry out the closing of the nuclear test site in May".
Mr Yoon added that the North Korean leader had also said he "would soon invite experts of South Korea and the US to disclose the process to the international community with transparency".
The office also said North Korea would change its time zone - currently half an hour different - to match that of the South.
North Korea has so far made no public comments on the issue.
The nuclear tests have taken place in a system of tunnels dug below Mount Mantap, near the Punggye-ri site.