A former Ukrainian special forces soldier identified as Serhii K goes on trial in Hamburg, Germany, charged with causing an explosion and committing a war crime over the September 2022 blasts that ruptured the Nord Stream gas pipelines (undersea Russia-to-Germany links) in the Baltic Sea. Prosecutors allege he led a diving crew using a rented yacht and acted for Ukrainian state agencies; he and Kyiv deny involvement, and he was arrested in Italy in August 2025 and later extradited. The case, which has initially pointed blame at Moscow, is politically awkward for Berlin and Kyiv, as Germany is Ukraine's largest military aid supplier and the far-right AfD is using it to argue against supporting Kyiv.