No-one admitted carrying out the attack, and Ukraine has denied involvement.

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German prosecutors say a Ukrainian man has been arrested in Italy on suspicion of blowing up the Nord Stream gas pipelines under the Baltic Sea, several months after the start of Russia's full-scale invasion of Ukraine in 2022.

The man, identified only as Serhii K, was arrested in the province of Rimini and was part of a group who planted explosives under the Nord Stream 1 and Nord Stream 2 pipelines from Russia to Germany, federal prosecutors said.

Blasts on the Nord Stream gas pipelines severed a key source of natural gas for Europe when leaders were facing an energy crisis triggered by Russia's war.

No-one admitted carrying out the attack, and Ukraine has denied involvement.

The Ukrainian, who was detained by Italy's carabinieri military police stationed in the northern coastal resort of Misano Adriatico, is suspected of being one of the masterminds of the operation.