The North and South has been host to high tensions in recent weeks. The most explosive encounter came as North Korea demolished a joint liaison office for Korean peace relations.
Daily NK revealed North Korean military units near the inter-Korean border are still on high-alert for combat readiness.
This is despite leader Kim Jong-un’s decision to “postpone” military action against the South on June 23.
A Daily NK military source told Daily NK: “The [military] leadership has not ordered the [high state of combat readiness] to be dismantled.
“The entire military [near the inter-Korean border] is conducting drills and other activities under a high state of combat readiness.”
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The country’s General Staff Department (GSD) ordered all military units on the country’s front lines to enter their highest state of alert by 5pm on June 21.
These forces include select naval and air force units in the area.
The high alert order is because Kim Jong-un only ordered to “postpone” military action, rather than to cancel them.
Daily NK’s source pointed out that ending the high alert state just four days after it was implemented could reduce moral in soldiers.
North Korea’s hardline stance on South Korean relations has been ongoing since early June, which may have been sparked by fears of an economic slump eroding political power.
Kim Yo Jong, Leader Kim Jong-un’s sister and close aide, has been pushing for an escalation of conflict between the two Korea’s.
She said in a statement: “I feel it is high time to break with the South Korean authorities.”
In her role as first vice department director of the Central Committee of the ruling party, she has threatened to scrap a military pact with South Korea if it fails to stop defectors airdropping leaflets that are highly critical of the North’s regime.
She has also recently supervised other policy matters relating to Seoul, according to state-run media.
It comes after 2018’s Panmunjom Declaration has been mostly abandoned by the North.
At a summit in April 2018, Kim Jong Un and South Korean President Moon Jae In signed the declaration, which agreed to set up a joint liaison office and cease all hostile acts, including the dropping of leaflets.
South Korea has urged its northern neighbour to honour the bilateral agreements, saying they “should be fully implemented to establish peace on the Korean Peninsula and to prevent accidental clashes” between them.