German federal prosecutors say Ukrainian national Vladimir Z. was arrested in Pula, Croatia, on Aug. 19, 2026, over the September 2022 explosions that damaged the Nord Stream 1 and Nord Stream 2 gas pipelines. Prosecutors allege that the trained scuba diver belonged to a group that planted explosives near Denmark’s Bornholm island and accuse him of jointly causing explosions, anti-constitutional sabotage and destruction of buildings and structures. The arrest is the second formal detention in Germany’s investigation and follows charges filed in July 2026 against former Ukrainian army officer Serhii K. Prosecutors allege that the suspects and others used a yacht launched from Rostock, rented through intermediaries with forged identification documents, to carry out the operation. Sweden and Denmark closed their separate investigations without bringing charges, leaving Germany as the sole authority pursuing the criminal case. Earlier reporting gave differing details about the identity and location of another Ukrainian suspect, including a detention in Poland; the latest German account identifies the Croatian detainee as Vladimir Z.