First Trial Over Nord Stream Pipeline Sabotage Opens in Germany Against Ukrainian Ex-Officer

German federal prosecutors opened their case Wednesday by labeling the 2022 destruction of the Nord Stream gas pipelines a war crime against civilian infrastructure orchestrated by Ukrainian state agencies. Across the courtroom, defense lawyers countered that the pipelines were never civilian heating conduits, but rather a geopolitical weapon deployed by Russia to finance an illegal invasion.[1][5]

The opposing legal frameworks collided at the Hanseatic Higher Regional Court in Hamburg as 50-year-old Serhii Kuznietsov became the first person to stand trial for the underwater blasts. The former Ukrainian special forces officer faces charges of causing an explosion, damaging property, and acting as an accomplice to war crimes.[1][4]

Kuznietsov, who appeared in a gray suit and saluted upon entering the courtroom, maintained his right to silence while the indictment was read and translated into Ukrainian. He was arrested in August 2025 while vacationing with his family in Italy and extradited to Germany three months later.[1][4]

The trial marks a sensitive diplomatic juncture for the German government, which remains Ukraine's largest European military supplier. The proceedings force a public examination of an attack that severed Germany's primary source of cheap natural gas and accelerated an energy crisis across the continent.[1][5]

The Prosecution's Case

Prosecutors allege that Kuznietsov led a seven-person sabotage team that executed the operation on September 26, 2022. The group reportedly included four deep-sea divers, an explosives expert, and a boat captain, who utilized a rented 50-foot yacht that departed from the German port city of Rostock.[1][4]

According to the federal indictment, the team navigated to a location near the Danish island of Bornholm, where the pipelines run along the Baltic Sea floor. Divers allegedly descended roughly 80 meters to plant at least four timer-controlled incendiary devices, each weighing up to 27 kilograms.[1][4]

The resulting explosions ruptured three of the four concrete-coated steel pipelines comprising the Nord Stream 1 and 2 networks. The blasts released an estimated 485,000 tons of methane into the atmosphere and permanently disabled the infrastructure built by the Russian state energy giant Gazprom.[4][5]

At the time of the September 2022 detonations, none of the targeted pipelines were actively pumping gas to Europe. Moscow had already suspended deliveries through the Nord Stream 1 conduits, while the newly completed Nord Stream 2 project had its certification halted by Berlin days before the invasion.[5]

Despite being offline, the pipelines remained pressurized with massive quantities of natural gas. The sabotage permanently removed the physical possibility of Germany quickly resuming direct energy imports from Russia, forcing Berlin to rapidly secure alternative supplies to replace the lost capacity.[4][5]

The prosecution asserts the operation was not a rogue endeavor. The indictment states the saboteurs were acting by order of Ukrainian state agencies with the explicit objective of permanently disrupting gas supplies and denying Moscow the revenue required to fund its military campaign.[1][4]

"The aim was to permanently halt gas supplies via the pipelines and prevent Russia from using the revenue from natural gas trade to finance its war effort," German state prosecutors argued in court documents outlining the charges against the former military officer.[1]

The Defense Strategy

Kuznietsov's legal team immediately challenged the foundation of the charges, arguing that the destruction of the pipelines cannot be classified as a war crime. Defense lawyer Nicola Canestrini told the court that the infrastructure was a legitimate military target in the context of Russia's aggression.[5]

"In September 2022, the pipelines were not supplying anyone with heat," Canestrini argued during the opening session. "They were a means of exerting pressure in a war," he added, suggesting that the trial was treating a soldier acting in national defense like a criminal defendant.[5]

The defense also highlighted the restrictive conditions of Kuznietsov's pre-trial detention. Lawyers noted he had been held almost entirely in solitary confinement for 11 months since his extradition, describing his treatment as being handled like a pawn on a chessboard.[1]

Furthermore, the legal team indicated they plan to produce affidavits from two of Kuznietsov's military superiors. These documents are intended to demonstrate that his status as an active-duty officer prohibits him from disclosing operational details, thereby limiting his ability to mount a conventional defense.[1]

The defense strategy underscores the unprecedented nature of the prosecution. Lawyers for the former military officer argued that blowing up Russian infrastructure may not have been a crime at all, setting up a complex legal battle over the definition of civilian infrastructure during an active armed conflict.[5]

Geopolitical Fallout and Accomplices

The Ukrainian government, including President Volodymyr Zelenskyy, has consistently denied any state involvement in the Nord Stream sabotage. However, German investigators have steadily pursued a trail pointing toward Kyiv, leading to multiple international arrest warrants over the past year.[1][4]

The German federal prosecutor's office took jurisdiction over the politically sensitive case because the Nord Stream network makes landfall in the northern German coastal town of Lubmin. Parallel investigations by Danish and Swedish authorities were closed earlier without filing criminal charges, leaving Berlin to pursue the perpetrators alone.[4]

A second suspect, identified in court documents as Volodymyr Z., was arrested in the Croatian town of Pula in August 2026 on a European warrant. He is currently fighting extradition to Germany, while the remaining members of the alleged sabotage team remain at large.[4]

Outside the Hamburg courthouse, dozens of pro-Ukrainian demonstrators gathered behind police barricades to support the defendant. The protesters held placards reading "Russia is a terrorist" and questioned the morality of prosecuting the destruction of a pipeline while Ukrainian cities face daily bombardment.[5]

"Russia is the only war criminal that belongs in the dock," said one of the dozens of protesters gathered outside the court. The demonstrators argued that the trial misplaced the blame for the broader conflict, viewing the pipeline destruction as a legitimate consequence of the invasion.[5]

The trial is scheduled to resume on October 27 and is expected to last for several months. The proceedings will require the Hanseatic Higher Regional Court to navigate strict privacy laws, classified military intelligence, and the diplomatic strain of prosecuting an allied nation's soldier.[1][4]