The three Baltic states disconnected their electricity systems from Russia's power grid on Saturday, the region's operators said, part of a plan designed to integrate the countries more closely with the European Union and boost security.

The Brell grid - which stands for Belarus, Russia, Estonia, Latvia, Lithuania - is controlled almost entirely by Russia and has long been seen as a vulnerability for the former Soviet republics, which are now Nato members.

Three Baltic states yesterday cut ties with Russia’s power grid to join the European Union’s network, the culmination of a years-long process that gained urgency with Moscow’s invasion of Ukraine.