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South Korea's presidential office has voiced strong displeasure with Ukraine over the handling of two North Korean prisoners of war who were recently transferred to Seoul, accusing Kyiv of violating a confidentiality agreement and then publicly denying that any such arrangement existed. The rare public rift between the two governments marks a significant setback in a relationship that had been steadily deepening since Russia's full-scale invasion of Ukraine in 2022.
The dispute centers on an operation that Ukraine's President Volodymyr Zelenskyy announced during his address to the United Nations General Assembly last week. Zelenskyy told world leaders that his country had sent two North Korean soldiers captured on the battlefield to South Korea. The announcement was framed as a humanitarian gesture, but it caught Seoul off guard and, according to South Korean officials, breached a pledge to keep the transfer confidential.
Seong Ghi-hong, South Korea's senior presidential secretary for public relations, said in a statement that President Lee Jae Myung's office "expresses strong regret over Ukraine's unilateral disclosure and its subsequent false announcement that there had not been a non-disclosure agreement." The statement, carried by the Yonhap news agency, represents one of Seoul's sharpest public rebukes of Kyiv since the war began.
According to the South Korean government, the confidentiality arrangement was not a bureaucratic formality but a security imperative. Officials argued that keeping the transfer secret was necessary to protect the two soldiers from potential retaliation, in line with international law and fundamental humanitarian principles. Disclosing their whereabouts, Seoul contends, could expose them and their families in North Korea to serious danger.
Ukraine has pushed back against that characterization. The Ukrainian presidential office said it had revealed the transfer without offering extensive details about how it was carried out, arguing that it would have been strange to conceal the entire operation from the public. Ukrainian media, citing a presidential source, went further by denying that any confidentiality agreement with Seoul had ever existed—a claim that South Korean officials have explicitly labeled as false.
The conflicting accounts have injected fresh tension into a bilateral relationship that had been expanding on multiple fronts. South Korea has provided humanitarian and financial support to Ukraine, participated in reconstruction discussions, and aligned itself with Western sanctions against Moscow. The two countries had also been cooperating on intelligence and diplomatic matters, including the treatment of North Korean personnel deployed to support Russia's war effort.
The two captured soldiers were taken by Ukrainian forces in Russia's Kursk region in January 2025, where North Korean units had been deployed alongside Russian troops. Their capture was notable because mounting evidence—drawn from intelligence reports and the testimonies of defectors—indicates that North Korean soldiers are under orders to self-detonate or take their own lives rather than surrender. Zelenskyy underscored that reality in his UN speech, describing one of the captured men as shocked that fate had prevented him from dying after he attempted suicide upon realizing he would be taken alive.
South Korean media have reported that both soldiers expressed a desire to defect to South Korea once they learned of the possibility. That aspiration has made their case politically sensitive on the Korean Peninsula, where Pyongyang treats defection as a grave betrayal and often punishes relatives left behind. It also explains why Seoul placed such emphasis on shielding the men's identities and movement from public view.
The prisoner issue had been a recurring topic in high-level diplomacy between Seoul and Kyiv. When President Lee met Zelenskyy on the sidelines of the NATO summit in Ankara, Turkiye, in July, the two leaders agreed to resolve the status of North Korean POWs in accordance with international law, according to senior presidential spokesperson Kang Yu-jung. That understanding built on an earlier commitment made during a South Korea-Ukraine foreign ministers' meeting in March, where both sides pledged to cooperate on the issue. The latest episode therefore represents a breakdown of an established channel rather than a dispute over a novel matter.
The broader context is the scale of North Korea's involvement in the war. South Korean intelligence estimates that Pyongyang has deployed roughly 14,000 to 15,000 soldiers to support Russia since 2024, primarily in the Kursk border region. South Korean, Ukrainian and Western officials say those units have suffered heavy casualties, with more than 6,000 North Korean troops killed in combat. The two POWs transferred to Seoul are among a very small number of survivors who fell into Ukrainian hands.
For Seoul, the episode carries domestic political weight as well. The government of President Lee has been signaling openness to reviving dialogue with North Korea, and U.S. President Donald Trump has renewed his own willingness to engage Pyongyang. A public dispute with Ukraine over the treatment of North Korean defectors could complicate that diplomatic outreach, giving Pyongyang propaganda ammunition while raising questions in Seoul about whether its humanitarian commitments to the soldiers can be guaranteed.
South Korean officials have said the government is considering additional measures if necessary, though they did not specify what those steps might entail. Analysts suggest the options range from a formal diplomatic protest to a reassessment of intelligence-sharing arrangements. Either way, the incident has damaged the trust that had been cultivated over months of cooperation, and it remains unclear how quickly the two sides can repair it.
The affair also highlights a persistent dilemma in wartime diplomacy: the tension between a government's need for public credit and its partners' need for operational secrecy. Kyiv's decision to publicize the transfer served its broader campaign to keep international attention on North Korea's role in the war. Seoul's insistence on discretion reflected the fragile reality of handling defectors whose families remain within reach of the North Korean state.
What happens next may depend on whether the two governments can agree on a factual baseline. South Korea has demanded acknowledgement that an agreement existed; Ukraine has so far refused to concede that point. Without a resolution, a relationship that has quietly become one of Kyiv's more reliable partnerships in Asia risks cooling at precisely the moment both countries face mounting pressure from an extended war.
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