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Theon Saturday accused the UK of being "involved" in explosions on the gas pipes, alleging the same British military specialists had helped Ukraine plan a drone attack on Moscow's Black Sea Fleet.

Russia did not provide any evidence, but considers the UK as one of the most unfriendly countries, with relations sinking to almost non-existent since the Kremlin sent troops to .

"Representatives of this unit of the British Navy took part in the planning, provision and implementation of a terrorist attack in the Baltic Sea on September 26 that blew up the Nord Stream 1 and Nord Stream 2 gas pipelines," Russia's defence ministry said in a statement.

Russia has said Western countries have not allowed it to take part in international investigations of the explosions.

Instead, it has for weeks alluded that its special services have a different version to what caused the Septembers explosions, while some Western countries have called it sabotage and pointed at Russia.