Seoul’s demand for an apology has strained relations with Kyiv, bringing prisoner protection and Korean Peninsula security into the diplomatic fallout from Russia’s war.
South Korean President Lee Jae Myung threatened unspecified measures against Ukraine on October 2 unless Kyiv acknowledged a confidentiality agreement covering the transfer of two captured North Korean soldiers and issued a public apology.
The dispute began after Ukrainian President Volodymyr Zelenskyy told the United Nations General Assembly that the prisoners had been sent to South Korea. Seoul says the disclosure violated an agreement to keep the transfer confidential. Ukrainian officials deny that such an agreement existed. No retaliatory measures have been announced.
A North Korean Prisoner Transfer Becomes a Diplomatic Dispute
The North Korean prisoners were captured in January 2025 while fighting alongside Russian forces in Russia’s Kursk region. They arrived in South Korea in mid-September, according to South Korean officials and lawmakers cited by The Korea Herald. Zelenskyy disclosed the transfer during his September 23 UN address.
A senior South Korean official said confidentiality was intended to protect the soldiers and their families indefinitely. The official also said the transfer agreement had been finalized during talks between the countries’ foreign ministers in June and involved no compensation or concessions for Ukraine. These remain Seoul’s account of arrangements that Kyiv disputes.
South Korea summoned Ukraine’s chargé d’affaires on September 28 to protest the disclosure. Its foreign ministry warned that Kyiv’s handling of the matter undermined trust and risked damaging bilateral relations, AFP reported.
Shared Security Interests, Different Priorities
The confrontation highlights how North Korea’s military support for Russia has connected the war in Europe with security concerns in Asia.
The captured soldiers were among thousands of North Korean troops deployed to support Moscow. For Lee’s administration, their arrival also presents a sensitive issue as it seeks to restore dialogue with Pyongyang, which has previously reacted angrily to defections.
Analysts interviewed by The Associated Press said Seoul has strong reasons to preserve cooperation with Kyiv. Ukraine possesses valuable intelligence about Russia-North Korea military ties and battlefield experience, including the use of drones, that could benefit South Korean security.
Lee has separately criticized Ukrainian remarks about the possibility of conflict between the two Koreas. Yonhap reported that his criticism appeared directed at Ukrainian presidential office chief Kyrylo Budanov, who argued that North Korea was using experience from the war to prepare for potential combat in its own region. That is a Ukrainian assessment, rather than evidence that an inter-Korean conflict is imminent.
Diplomatic Talks Continue
Despite the sharper public exchanges, both governments remain in contact. Ukrainian Foreign Minister Andrii Sybiha described the situation on October 1 as a “diplomatic misunderstanding” and expressed hope for a swift resolution.
South Korean Foreign Minister Cho Hyun and Sybiha have been discussing the wording and form of a possible Ukrainian response, including an apology, according to the senior South Korean official quoted by The Korea Herald. The discussions seek to reconcile Seoul’s demands with what Kyiv is prepared to accept during wartime.
The immediate question is whether those contacts can produce a statement acceptable to both governments. Resolving the dispute would help preserve cooperation while addressing Seoul’s stated concerns about confidentiality and prisoner safety. A prolonged confrontation would place additional strain on a relationship with security implications for both Europe and the Korean Peninsula.
