North Korea says South Korea fired warning shots at its soldiers; Seoul says troops crossed border

South Korea fired warning shots at North Korean soldiers that briefly crossed the heavily fortified border earlier this week, Seoul said Saturday (August 23, 2025) after Pyongyang accused it of risking “uncontrollable” tensions.

South Korea’s new leader, Lee Jae Myung, has sought warmer ties with the nuclear-armed North and vowed to build “military trust”, but Pyongyang has said it has no interest in improving relations with Seoul.

Also read: North Korea says South Korea’s overtures ‘great miscalculation’

Seoul’s military said several North Korean soldiers crossed the border Tuesday (August 19, 2025) while working in the heavily mined Demilitarised Zone (DMZ) separating the two Koreas.

The incursion prompted “our military to fire warning shots”, Seoul’s Joint Chiefs of Staff said in a statement, adding, “the North Korean soldiers then moved north” of the de facto border.

Pyongyang’s state media said earlier Saturday  (August 23, 2025) that the incident occurred as North Korean soldiers worked to permanently seal the frontier dividing the peninsula, citing a statement by Army Lieutenant General Ko Jong Chol.

Calling the event a “premeditated and deliberate provocation”, General Ko said Seoul’s military used a machine gun to fire more than 10 warning shots towards the North’s troops, according to the official Korean Central News Agency.

“This is a very serious prelude that would inevitably drive the situation in the southern border area where a huge number of forces are stationing in confrontation with each other to the uncontrollable phase,” General Ko said.

Sealing the border

The last border confrontation between the arch-rivals was in early April when South Korea’s military fired warning shots after around 10 North Korean soldiers briefly crossed the frontier.

North Korea’s military announced last October it was moving to totally shut off the southern border, saying it had sent a message to U.S. forces to “prevent any misjudgment and accidental conflict”.

Also read: South Korea says North Korea fired several missiles toward its eastern waters in May 2025

Shortly after, it blew up sections of the unused but deeply symbolic roads and railroad tracks that connect the North to the South.

General Ko warned that North Korea’s Army would retaliate against any interference with its efforts to permanently seal the border.

“If the act of restraining or obstructing the project unrelated to the military character persists, our army will regard it as deliberate military provocation and take corresponding countermeasure,” he said.

‘Restore trust’

Under Mr. Lee’s more hawkish predecessor, relations between the two Koreas had sunk to one of their lowest points in years.

After Mr. Lee’s election in June, he pledged to pursue dialogue with the nuclear-armed North without preconditions, saying last week his government “will take consistent measures to substantially reduce tensions and restore trust”.

Even so, South Korea and the United States began annual joint exercises on Monday (August 18, 2025) aimed at preparing for potential threats from the North.

Mr. Lee described the drills as “defensive” and said they were “not intended to heighten tensions”.

North Korea — which attacked its neighbour in 1950, triggering the Korean War — has long been infuriated by such exercises between the U.S. and the South, decrying them as rehearsals for invasion.

Hong Min, a senior analyst at the Korea Institute for National Unification, said Pyongyang was again accusing Seoul of pursuing a “dual approach” with its latest outburst — calling for dialogue while in its view raising military tensions.

Pyongyang’s leader Mr. Kim called earlier this week for the “rapid expansion” of the North’s nuclear weapons capability, citing the ongoing U.S.-South Korean military exercises that he claimed could “ignite a war”.

His powerful sister has since said Seoul “cannot be a diplomatic partner” of the North and that Mr. Lee “is not the sort of man who will change the course of history”.