The Baltic states are set to sever ties with Russia's power grid that date back to the 1950s, and instead integrate further with the European Union, as the suspected sabotage of subsea cables has spurred efforts to strengthen regional security.

The three Baltic states on Saturday seamlessly cut ties with Russia's power grid to integrate with the European Union's network, a switch that gained urgency with Moscow's invasion of Ukraine.

After the Baltic decoupling, the energy system in the Russian enclave of Kaliningrad will lose its grid connection to mainland Russia. Kaliningrad has been building up power generation capacity for years and Kremlin spokesperson Dmitry Peskov dismissed all concerns.

Formerly part of the Soviet Union, the staunch supporters of Ukraine switched off the Russian grid's transmission lines on Saturday.

Because of the Baltic decoupling, the energy system in Kaliningrad will no longer have grid connection to mainland Russia. The exclave is located between Lithuania and Poland and has not border with the rest of Russia.

Lithuania said on Saturday it had disconnected its electricity system from Russia's power grid, part of a plan which the three Baltic states say will integrate them more closely with the European Union and boost security.