North Korean Lt Gen An Ik San, second from right, shakes hands with South Korea's Maj Gen Kim Do-gyun during a meeting inside the Peace House at the border village of Panmunjom in 2018.
A South Korean official uses a cross-border hotline at the liaison office in the Joint Security Area.
In this photo taken on September 16, 2020, South Korean Unification Minister Lee In-young looks at the inter-Korean hotline during a visit to the south side of the truce village of Panmunjom in the Demilitarised Zone dividing the two Koreas.
A South Korean government official talks to a North Korean officer during a phone call in 2018 at the border village of Panmunjom in Paju, South Korea.
The flags of South and North Korea fly in the South's Daeseong Village, bottom, and the North's Kijong Village, top, in this photo taken from an observatory in the South Korean border city of Paju on July 27, 2021. The two Koreas reopened direct cross-border communication lines that Pyongyang severed last year.
South Korean soldiers inspect and their North Korean counterparts during a reunification rally in the border village of Panmunjom at the DMZ in North Korea, in 2015.
North Korean Lt Gen An Ik San, centre left, shakes hands with South Korean Maj Gen Kim Do-gyun upon his arrival at the Peace House at the border village of Panmunjom in 2018
South Korean President Moon Jae-in and North Korean leader Kim Jong-un clap after planting a commemorative tree at the Joint Security Area in the border village of Panmunjom in Paju, South Korea, on April 27, 2018.
North Korean leader Kim Jong-un and South Korean President Moon Jae-in in front of a stone inscribed 'Peace and Prosperity Are Planted' as they participate in a tree-planting ceremony at the truce village of Panmunjom in 2018.
North Korean Lt Gen An Ik San, second from right, shakes hands with South Korea's Maj Gen Kim Do-gyun during a meeting inside the Peace House at the border village of Panmunjom in 2018.
A South Korean official uses a cross-border hotline at the liaison office in the Joint Security Area.
In this photo taken on September 16, 2020, South Korean Unification Minister Lee In-young looks at the inter-Korean hotline during a visit to the south side of the truce village of Panmunjom in the Demilitarised Zone dividing the two Koreas.
A South Korean government official talks to a North Korean officer during a phone call in 2018 at the border village of Panmunjom in Paju, South Korea.
The flags of South and North Korea fly in the South's Daeseong Village, bottom, and the North's Kijong Village, top, in this photo taken from an observatory in the South Korean border city of Paju on July 27, 2021. The two Koreas reopened direct cross-border communication lines that Pyongyang severed last year.
South Korean soldiers inspect and their North Korean counterparts during a reunification rally in the border village of Panmunjom at the DMZ in North Korea, in 2015.
North Korean Lt Gen An Ik San, centre left, shakes hands with South Korean Maj Gen Kim Do-gyun upon his arrival at the Peace House at the border village of Panmunjom in 2018
South Korean President Moon Jae-in and North Korean leader Kim Jong-un clap after planting a commemorative tree at the Joint Security Area in the border village of Panmunjom in Paju, South Korea, on April 27, 2018.
North Korean leader Kim Jong-un and South Korean President Moon Jae-in in front of a stone inscribed 'Peace and Prosperity Are Planted' as they participate in a tree-planting ceremony at the truce village of Panmunjom in 2018.
North Korean Lt Gen An Ik San, second from right, shakes hands with South Korea's Maj Gen Kim Do-gyun during a meeting inside the Peace House at the border village of Panmunjom in 2018.