Ukraine has halted Russian gas supplies to European customers through a Ukraine's pipeline network, almost three years into Moscow’s all-out invasion of its southern neighbor.

Ukrainian Energy Minister German Galushchenko also says Kyiv can buy electricity from Romania and Poland if it loses supplies from Bratislava.

Poland is prepared to step up electricity exports to Ukraine if Slovakia’s Prime Minister Robert Fico follows through on his threat to cut off back-up power supplies to the war-torn country, a senior official said on Sunday.