North Korea has destroyed guard posts in the Demilitarized Zone, as part of a bid to improve relations with the South.
The destruction of the pillboxes on the heavily fortified border came after an agreement with South Korea to "completely destroy" such locations in the region.
Footage provided by South Korea’s defence ministry showed guard posts in North Korea destroyed up in thick smoke.
They appear to have been packed with explosives that were detonated remotely.
The explosions sent fragments of rock and fire into the air as the heavily entrenched fortifications were destroyed.
It follows a military pact at a summit last month in North Korea that called for a halt to "all hostile acts", a no-fly zone near the border and the gradual removal of guard posts, firearms and landmines from the DMZ separating the two.
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The pillboxes are being destroyed as part of a peace agreement between North and South Korea
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As an initial step, the neighbors agreed to demolish 11 guard posts within 0.6 miles of each side of the border and withdraw equipment and personnel stationed there by the end of November, the ministry said.
Tensions have been thawing in the region over the last year.
In April the nations signed the Panmunjom Declaration, which it is hoped will ultimately pave the way for the denuclearisation of the penninsular.
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The DMZ is a 160-mile heavily fortified buffer zone between the two countries that separates the North and South with a 2.5-mile wide no man’s land.
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