Pyongyang is furious North Korean defectors have been able to launch leaflets, attached to balloons, from the South into its territory. In response North Korea has threatened military action and cut hotline communication ties with Seoul.
On Tuesday North Korean forces blew up an inter-Korean liaison office situation on their side of the border.
The state controlled KCNA news agency claimed the North Korean people are “actively pushing forward with the preparations for launching a large-scale distribution of leaflets”.
It added: “Every action should be met with proper reaction and only when one experiences it oneself, one can feel how offending it is.”
North and South Korea remain technically at war as the 1950-53 conflict ended without an official peace treaty.
Both South and North Korea have long histories of launching propaganda materials into each others territories.
In 2010 the South Korean army ended a program that say anti-Pyongyang leaflets sent over the demilitarised zone.
However several North Korean defectors groups based in the south are continuing the operation.
As well as leaflets they have been dispatching food, miniature radios and USB sticks loaded with South Korean news and entertainment.
READ MORE: North Korea’s secret plan revealed by experts following attack
Two North Korean defectors, Park Sang-hak and Park Jong-oh, have indicated they plan to launch leaflets into the North over the weekend.
South Korean authorities have threatened to arrest and prosecute them if they go ahead with the plan.
Police have stepped up security around the border are in case any attempt is made.
However both defectors insist their operation will go ahead regardless of the risks.
Korea was split in the aftermath of WWII between the communist North and anti-communist South.
The division aligned with the areas of the country captured by Soviet and American forces respectively.
During WWII Korea endured a brutal occupation by imperial Japanese forces.
In 1950 North Korea invaded the South triggering the Korean war.
North Korean forces were pushed back with the help of UN forces before China intervened.
The conflict, which was only ended with a ceasefire, cost approximately five million lives.