Ukraine South Korea relations have entered a serious diplomatic dispute after Seoul warned that it could take further measures unless Kyiv apologizes for publicly disclosing the transfer of two North Korean prisoners of war.
South Korean President Lee Jae Myung said Friday, October 2, 2026, that Seoul was seeking an acknowledgement of what it described as a confidentiality agreement covering the transfer and a public apology from Ukraine.
The dispute began after Ukrainian President Volodymyr Zelenskyy said during a speech at the United Nations General Assembly in September that Ukraine had sent two captured North Korean soldiers to South Korea.
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Why Ukraine South Korea relations have deteriorated
The two North Korean soldiers were captured by Ukrainian forces while fighting alongside Russian troops in the Kursk region in January 2025, according to accounts of the transfer.
Both men reportedly expressed a desire to settle in South Korea rather than return to North Korea.
Seoul has consistently said that North Koreans who request protection in the South should be accepted under South Korea’s constitutional framework and relevant laws.
South Korean officials say the handover was handled through sensitive diplomatic discussions and that Kyiv agreed to keep the arrangement confidential.
Seoul objected after Zelenskyy mentioned the transfer publicly and after Ukrainian officials disputed the existence or scope of a non-disclosure understanding.
A senior South Korean Foreign Ministry official said Friday that the two foreign ministers were communicating directly about the wording and tone of a possible announcement, including an apology.
The official said the details had not yet been finalized.
Seoul says the issue involves more than protocol
South Korea’s concern is closely tied to the security consequences of North Korean involvement in Russia’s war against Ukraine.
Seoul has spent the past two years warning that North Korean troops, weapons and military cooperation with Russia could strengthen Pyongyang’s capabilities and create a direct connection between the European war and the Korean Peninsula.
At the same time, the South Korean government has been cautious about publicizing the arrival of the two soldiers.
Their transfer could anger North Korea, complicate Seoul’s efforts to manage tensions with Pyongyang and create questions about the safety and future treatment of the men.
Lee also criticized remarks from the Ukrainian side that Seoul interpreted as encouraging a possible military confrontation between North and South Korea.
He said such comments were unacceptable to a government attempting to prevent a new escalation on the peninsula.
What Seoul has provided to Ukraine
The dispute risks affecting a relationship that had been developing despite South Korea’s refusal to provide Ukraine with lethal weapons directly.
South Korea has supplied humanitarian and financial assistance and has supported reconstruction efforts.
At the NATO summit in July, Seoul announced a further $100 million package of comprehensive support for Ukraine.
During a July 8 meeting in Ankara, Lee and Zelenskyy agreed that the North Korean prisoner issue should be addressed in a manner that respected the individuals’ free will and complied with international law and humanitarian principles.
The South Korean presidential office said the leaders also discussed continued cooperation on Ukraine’s recovery and reconstruction.
South Korean Foreign Minister Cho Hyun and Ukrainian Foreign Minister Andrii Sybiha held talks in Seoul on June 30.
Their governments again said the prisoner issue should be resolved according to international law, humanitarian principles and the wishes of the individuals involved.
What happens next
The immediate question is whether Kyiv will issue the apology Seoul is demanding and whether the two governments can agree on language that limits further damage to bilateral ties.
South Korea has not publicly detailed the additional measures Lee threatened.
They could involve diplomatic restrictions, a review of planned cooperation or a reassessment of future assistance, but officials have not confirmed a specific response.
Ukraine, meanwhile, has an interest in preserving South Korean financial, humanitarian and reconstruction support as it seeks international backing for its war effort and eventual recovery.
The prisoner issue also carries wider implications.
The two men are among the clearest human examples of North Korea’s military participation in Russia’s war.
Their presence in South Korea could provide information about North Korean deployments, training and battlefield conditions, but public discussion of their identities and movements could expose them to additional political and security risks.
For now, both sides have kept communication channels open.
The June and July agreements show that Kyiv and Seoul had previously established a framework based on international law and the prisoners’ own choices.
The current dispute centres on whether Ukraine breached the confidentiality expected around that process.
A negotiated apology could prevent the disagreement from becoming a broader rupture.
If no compromise is reached, the dispute could affect South Korea’s willingness to expand support for Ukraine and make future cooperation on North Korean soldiers more difficult.
Frequently Asked Questions
What caused the Ukraine-South Korea dispute?
South Korea says Ukraine publicly disclosed the transfer of two North Korean prisoners of war despite an understanding that the arrangement would remain confidential.
Who are the North Korean prisoners?
They are two North Korean soldiers captured by Ukrainian forces while fighting for Russia in the Kursk region in January 2025. Both reportedly wanted to settle in South Korea.
What is South Korea demanding from Ukraine?
Seoul is seeking acknowledgement of the confidentiality arrangement and a public apology from Kyiv.
Has South Korea announced specific penalties against Ukraine?
No specific measures have been publicly detailed. President Lee Jae Myung has warned that additional action could follow if Ukraine refuses to apologize.
Does South Korea provide military support to Ukraine?
South Korea has provided humanitarian and financial assistance and supports reconstruction, but it has maintained restrictions on directly supplying lethal weapons to Ukraine.
Fact-Checked: Key facts were checked against official statements from the South Korean presidential office, South Korean Foreign Ministry and Ukrainian presidential office.
Disclaimer: The diplomatic dispute remains active, and the positions of Ukraine and South Korea may change as ministerial discussions continue.