BERLIN (AP) — A Ukrainian citizen suspected of participating in the undersea explosions in 2022 thatdamaged the Nord Stream gas pipelinesbetween Russia and Germany has been arrested, German prosecutors said Thursday. The suspect, identified only as Serhii K. in line with German privacy rules, was arrested overnight in Italy's Rimini province, federal prosecutors said. They added that he is believed to be one of the coordinators of the operation. Explosions on Sept. 26, 2022, damaged the pipelines, which were built to carry Russian natural gas to Germany under the Baltic Sea. The damage added to tensions over thewar in Ukraineas European countries moved to wean themselves off Russian energy sources, following the Kremlin's full-scale invasion of Ukraine. The explosions ruptured the Nord Stream 1 pipeline, which was Russia's main natural gas supply route to Germany until Moscowcut off suppliesat the end of August 2022. They also damaged the Nord Stream 2 pipeline, which never entered service because Germanysuspended its certification processshortly before Russia invaded Ukraine in February of that year. Russia has accused the U.S. of staging the explosions, a charge Washington denies. The pipelines were longa target of criticism by the U.S.and some of its allies, who warned that they posed a risk to Europe's energy security by increasing dependence on Russian gas. In 2023, German media reported that a pro-Ukraine group was involved in the sabotage. Ukraine rejected suggestions it might have ordered the attack and German officialsvoiced cautionover the accusation.