Last autumn, two extradition cases involving Ukrainians accused over the Nord Stream gas pipeline sabotage were heard in courts in Italy and Poland. German prosecutors sought the extradition of a Ukrainian military officer, Serhiy Kuznetsov, and a diver, Volodymyr Zhuravlyov, alleging their involvement in the destruction of the undersea pipelines in late 2022. Despite facing similar evidence, the courts reached contrasting decisions: Kuznetsov was extradited to Germany to await trial, while Zhuravlyov was released after Poland dismissed the extradition request without evaluating the evidence. The Polish judge, Dariusz Lubowski, reasoned that any Ukrainian action against Russian infrastructure following Russia’s invasion of Ukraine constituted a “justified and legally fair act.”

The Nord Stream sabotage, regarded as one of the most significant acts of underwater sabotage since World War II, involved six freelance Ukrainian divers, sailors and soldiers operating from a small chartered yacht equipped with basic gear. They allegedly attached explosives to the Nord Stream pipelines, which is the world’s longest and one of the most politically sensitive subsea energy routes. Details of the operation, revealed in a recent investigative account by reporter Bojan Pancevski, depict a high-risk, improvised mission costing roughly $250,000, where volunteers took substantial personal risks rather than employing advanced military technology.

The sabotage profoundly impacted European energy dynamics, disrupting a critical link supplying Russian gas to Germany and wider Europe. The incident has been interpreted in various ways: some see it as an illegal attack on critical infrastructure and an environmental crime, citing the massive methane leak that followed, while others frame it as a legitimate countermeasure against Russian aggression following Moscow’s 2022 invasion of Ukraine.

Pancevski's investigation introduces the concept of "The Startup," a semi-private militia composed of saboteurs and their commanders. This group’s actions undermined the economic arrangement underlying Ukraine’s major European military patron, Germany. The group’s clandestine status, combined with sympathetic Western intelligence agencies’ knowledge, explains the secrecy surrounding the operation and the reluctance of many political actors to disclose full details.

The aftermath for the saboteurs has been precarious. Ukrainian President Volodymyr Zelenskyy and military officials have denied prior knowledge or authorization of the attack. Meanwhile, German investigators express concern for those involved, suggesting they face the risks of abandonment or worse. One saboteur reportedly died on the dangerous front lines in eastern Ukraine after the incident.

Despite the geopolitical complexity, investigators in Germany pursued the case vigorously, driven by constitutional independence and professional dedication, which led to the extradition requests and ongoing legal proceedings. The case highlights the murky nature of "grey warfare," operating in the shadows of state conflict, as there is no conclusive public evidence linking the Ukrainian government directly to the attack. Kuznetsov’s defense—that he acted as a serving soldier—is complicated by Kyiv’s silence on the matter.

The broader implications underscore the vulnerability of critical infrastructure to relatively simple yet effective sabotage tactics. One participant has claimed the operation could not have been carried out by Ukraine alone, suggesting Western intelligence involvement, though definitive proof is lacking. The Nord Stream sabotage thus serves as a stark example of how small, determined groups can pose significant threats to strategic assets in the evolving landscape of hybrid warfare.