North Korean leader Kim Jong Un plans to shutter his country's nuclear test site next month and will invite foreign experts and journalists to view the dismantling, as planning ramps up for a landmark meeting between him and U.S. President Donald Trump.

South Korean presidential spokesman Yoon Young-chan said Sunday that Kim had conveyed his intentions to South Korean President Moon Jae-in during Friday's historic inter-Korean summit, the first in more than a decade.

During their meeting, Kim and Moon vowed to press forward on the "complete denuclearization" of the Korean Peninsula, though their declaration did not include concrete steps on how they plan to reach that goal.