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.

Lithuania has warned of potential risks linked to the change, including possible cyber attacks, which will happen Saturday morning.

Nearly 3 1/2 decades after leaving the Soviet Union, the Baltic countries of Estonia, Latvia and Lithuania this weekend will flip a switch to end electricity-grid connections to neighboring Russia and Belarus.

The Baltic states will sever the last major energy link to Russia and become part of the EU’s electricity network on Sunday, at a time of deepening fears of further sabotage to critical cables. Estonia,