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

Slovakia will consider reciprocal measures against Ukraine such as halting back-up electricity supplies after Jan. 1 if Kyiv, as expected, stops the transit of Russian gas to Slovakia, Prime Minister Robert Fico said on Friday.

Zelensky said this was "the only possible meaning" of Fico's threats to cut off Ukraine's emergency power supply in the winter, given Russian attacks on power plants and the distribution network.