Troops from North and South Korea have begun removing some landmines along their heavily fortified border, according to the South’s defence ministry.
It is part of efforts to reduce tension and build trust on the divided peninsula.
Experts say more than a million landmines have been laid in border areas.
Project details were agreed between North Korea’s leader Kim Jong-un and South Korean President Moon Jae-in during a summit in the North’s capital, Pyongyang last month.
In a statement, the South Korean government said the two sides agreed to remove all landmines in the so-called Joint Security Area (JSA) in Panmunjom within the next 20 days.
The JSA is the only spot along a 250km long "demilitarised zone" (DMZ) where troops from both Koreas are face to face.
Military engineers are performing the hazardous task on the South Korean side.
There was no immediate confirmation from North Korea that its troops had begun the process.
The deal also provides for removal of guard posts and weapons from the JSA to follow the removal of the mines, with the troops remaining there to be left unarmed.
South Korean troops have gradually taken over most operations along their side of the border but international forces, under the US led United Nations Command, retain major roles.
UNC spokesman Colonel Chad Carroll declined to confirm if the command would also withdraw any weapons from the JSA.
However, he said American forces would provide support for the demining operation.
He said: "United States Forces Korea will perform a support role – to include having air medical evacuation assets available to respond within minutes of any potential medical emergencies."
The UNC said that since fighting during the 1950-1953 Korean War ended in a stalemate, at least nine soldiers have been killed in incidents with North Korean troops.
Dramatic video shows North Korean defector's dash for the border pic.twitter.com/ztYbF67vWk
— RTÉ News (@rtenews) November 22, 2017
In November 2017, North Korean troops at the JSA shot one of their soldiers defecting to the South five times.
More recently, it was the scene of the first dramatic April summit between Mr Kim and Mr Moon, as well as their second, more low-key meeting, in May.
In April, the neighbours announced their intention to turn the DMZ into a "peace zone".
They have already dismantled propaganda loudspeakers and some guard posts along the border.
The South Korean government has also said that demining projects are set to begin in the eastern province of Gangwon to allow teams to search for the remains of soldiers killed in the war.
