Relations between the North and the South - who are still technically at war despite the end of the Korean War in 1953 - have markedly improved in recent months.
After the latest summit between President Moon Jae-in and North Korean leader Kim Jong-un in Pyongyang last month, the two countries' defense chiefs signed the agreement fleshing out the military part of the April Moon-Kim summit declaration, which promised to halt "all hostile acts" against each other and practically eliminate the danger of war.
Seoul says South Korea has begun clearing mines from two sites inside the heavily fortified border with North Korea under a package of tension-reduction deal between the rivals. Seoul says North Korea is expected to begin its own demining as well.
The official refused to provide more details.
This image depicts South and North Korean troops participating in a landmine removal operation in the Demilitarized Zone.
The units will also remove landmines scattered near the jointly controlled area, such as observatories and small forests, the ministry said.
Experts believe the South Korean and United States militaries had planted about 1 to 1.2 million landmines south of the DMZ, which measures 250 kilometers in length and 4 kilometers in width. It's not known how many mines are at Panmunjom and Arrow Head Hill, but military commentator Lee Illwoo said the Koreas would be able to clear tens of thousands at most.
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KCNA said that Pyongyang was willing to take "such. steps as eternal dismantlement" of its nuclear complex "if the U.S. takes a corresponding measure" but again did not elaborate. The goal is make the area safe for troops from both North and South Korea.
As denuclearisation talks between the U.S. and North Korea continue to stall, Pyongyang has warned Washington that it can not use a declaration to end the Korean War as a bargaining chip.
"It's the start of peace".
In the "Arrow Head Hill", where some of the fiercest battles during the Korean War happened, Seoul officials believe there are remains of about 300 South Korean and United Nations forces along with an unspecified number of Chinese and North Korean remains.
The Koreas remain split along the 248-kilometer (155-mile) -long DMZ that was originally created as a buffer zone at the end of the Korean War.
It is also closely guarded by tens of thousands of troops on both sides, making it nearly impossible to walk across.
The work is part of an agreement between South Korean President Moon Jae-in and North Korean leader Kim Jung Un.