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Four years after the attacks, Serhii K will appear in court accused of a plot to destroy Russia’s gas pipelines to Germany. Source: bbc.co.uk.
What Happened
The attacks occurred off the island of Bornholm in the Baltic Sea. Three of the four Nord Stream pipelines were ruptured by explosions. The incident marked one of the most significant acts of sabotage in modern European history, with immediate geopolitical repercussions and a surge in international scrutiny of the role of state actors in wartime operations.
Germany has since prosecuted the case under its domestic legal framework. Serhii Kuznetsov, identified by German prosecutors, was arrested in August 2025 in Rimini, Italy, after checking into a hotel. He was transferred to Germany late last year following a lengthy legal battle involving multiple jurisdictions and extradition procedures.
German prosecutors allege that in 2022, Kuznetsov led a group of professional divers, a boat captain, and an explosives expert. They claim the group planned to destroy the pipelines as a means of disrupting Russia’s gas revenue during the ongoing war. According to the indictment, the plot was conceived and coordinated under the direction of Ukrainian state agencies, with the objective of undermining Russia’s financial capacity to sustain its military campaign.
Key Facts
- Germany’s federal court of justice ruled in January 2025 that the case falls under its jurisdiction due to threats to internal security. The court determined that the sabotage constituted a violation of Germany’s national security interests, as it targeted critical infrastructure vital to the country’s energy supply.
- German prosecutors allege the sabotage was ordered by Ukrainian state agencies and constitutes a war crime under international law, specifically under the category of attacks by military means against civilian objects. This classification is based on the United Nations Convention on the Law of Naval War, which prohibits attacks on non-combatant infrastructure.
- The case is one of the first to involve a suspect from Ukraine in a German criminal trial related to the attacks. This marks a significant moment in international legal cooperation, as it raises questions about the prosecution of foreign nationals in cross-border security cases during active conflicts.
- Another Ukrainian suspect, Volodymyr Zhuravlov, was released by a Polish court in October 2025. The Polish judge ruled that the attack on the pipelines was not unlawful and described any armed mission by Ukraine as ‘justified, rational and just’ under the circumstances of wartime necessity.
- Zhuravlov was arrested in Croatia in August 2025 on suspicion of participating in the dives necessary for the sabotage. Croatia has since approved his extradition to Germany, though the timeline and procedural details of his eventual trial remain uncertain.
Background and Investigation
Immediately after the blasts, Western nations expressed suspicion toward Russia. Vladimir Putin accused the US and UK of orchestrating the attacks, a claim both countries denied. This assertion, while politically charged, reflected a broader narrative in which Russia sought to deflect blame from its own actions and redirect international attention to Western powers.
Denmark and Sweden initially launched investigations into the incident. However, both suspended their inquiries by late 2022, citing a lack of conclusive forensic evidence and the complexity of linking any specific actors to the explosions. The investigations were also hampered by the absence of direct physical evidence from the pipeline sites, which were located in deep water and under significant environmental conditions.
German prosecutors then took over the case, focusing on a yacht named the Andromeda, which had been rented in the northern German port of Rostock. Swedish Coast Guard samples taken from the vessel revealed traces of subsea explosives. These findings were pivotal in forming the basis of the German investigation, though they did not establish direct causation between the yacht’s contents and the pipeline explosions.
Ukrainian Response
Oleksandr Merezhko, a member of Ukraine’s Foreign Affairs Committee, argues that the attacks occurred during an active war with Russia. He contends that Nord Stream 2 was a strategic tool used by Russia to prepare for the conflict, not a legitimate infrastructure project. Merezhko stated that Ukraine has no confirmation of the German account and described it as one of several possible narratives, underscoring the need for independent verification of such claims.
Despite the allegations, Merezhko maintains that the case will not damage Ukraine-Germany relations. He believes that continued support from Germany is in the best national interest of Ukraine, especially given the shared history of cooperation during the war. He notes that the trial is not a reflection of Ukraine’s military conduct, but rather a legal process that must be evaluated on its merits.
Political and Legal Context
German officials have sought to depoliticise the case. Stefan Meister of the German Council on Foreign Relations explained that successive chancellors have made efforts to ensure the trial is handled by institutions, not political actors. He emphasized that the case was not intended to be a political spectacle. The judiciary, not the government, should determine the outcome. This effort reflects a broader desire to maintain trust in legal processes and avoid public controversy.
However, the case remains sensitive. Germany and Ukraine have long been close allies since Russia’s full-scale invasion in February 2022. The trial raises fundamental questions about the nature of wartime operations, the role of state actors in sabotage, and the limits of state responsibility under international law. The legal process has become a focal point in broader debates about transparency, accountability, and the conduct of military operations during active conflicts.
Legal Challenges and Outcomes
Volodymyr Zhuravlov challenged Germany’s extradition request in a Polish court. In October 2025, the Polish judge ruled that the pipeline attack was not unlawful. The judge described any armed mission by Ukraine as ‘justified, rational and just’ under the circumstances of wartime necessity. This ruling, while legally significant, does not establish a precedent for similar cases in other jurisdictions.
Despite this ruling, Zhuravlov was arrested in Croatia in August 2025. Croatia has since approved his extradition to Germany. It is unclear whether his case will be integrated into the Hamburg trial. If so, it could expand the scope of the investigation and provide a broader understanding of the operational structure behind the alleged sabotage.
Why It Matters
The Nord Stream trial is one of the few cases where a foreign national is being prosecuted for sabotage linked to a major international incident. It underscores the legal and diplomatic challenges of prosecuting acts of sabotage during active conflicts. The case also reflects how states interpret their responsibilities under international law when dealing with attacks on critical infrastructure.
For Germany, the trial is a test of its commitment to upholding legal standards even in politically sensitive cases. For Ukraine, it is a moment of scrutiny over its military conduct during wartime. The outcome may influence how future nations respond to similar incidents, particularly in terms of accountability and transparency.
Public attention remains high. The case continues to be a focal point in discussions about international security, state accountability, and wartime operations. It also highlights the evolving role of international courts and legal systems in addressing acts of sabotage that occur in complex geopolitical environments.
Limitations and Open Questions
There is no direct evidence linking Kuznetsov or others to the actual explosions. The evidence remains circumstantial, based on planning and logistical activity. German prosecutors have not provided proof of direct involvement in the sabotage. The claim that the plot was ordered by Ukrainian state agencies remains unverified.
Ukraine has not acknowledged any role in the attacks. The lack of official confirmation raises questions about the credibility of the German allegations. It is also unclear whether the sabotage was a coordinated effort or an isolated incident. The absence of forensic evidence from the pipeline sites limits definitive conclusions.
Moreover, the full operational context of the alleged mission—such as the chain of command, the decision-making process, and the intent behind the sabotage—remains unclear. Without transparent access to classified military records or declassified intelligence, the case remains open to interpretation.
What to Watch Next
The Hamburg trial will likely proceed with Kuznetsov as the first suspect to face charges. If he is convicted, it may set a precedent for future cases involving foreign actors in wartime sabotage. The trial could also influence how other nations approach similar investigations.
Any developments involving Zhuravlov’s extradition or trial could influence how the broader case unfolds. The outcome may also shape future diplomatic relations between Germany and Ukraine. Public attention remains high, and the case continues to be a focal point in discussions about international security, state accountability, and wartime operations.
For more on the Nord Stream incident, see the BBC’s detailed report on the investigation and aftermath.
For a journey to the site of the explosions, visit the BBC’s video on the event.
For a deeper look at the legal and political context, explore the BBC’s coverage of the trial’s development.
Source: BBC News – Germany puts Ukrainian on trial accused of blowing up Nord Stream pipelines
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