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.

Prime Minister Robert Fico’s warning comes as the gas transit deal between Russia and Ukraine is set to expire at the end of the year.

Slovak Prime Minister Robert Fico announced on Dec. 27 that his government will evaluate potential reciprocal measures against Ukraine, including halting electricity supplies, if Ukraine stops the transit of Russian gas to Slovakia after January 1.

Slovakia may halt electricity supplies to Ukraine after Jan. 1 if Ukraine stops Russian gas transit to Slovakia. This follows Kyiv's decision against renewing a transit deal with Moscow. Slovak PM Robert Fico highlights potential economic impacts on Slovakia and the EU,

President Vladimir Putin said on Thursday there was no time left this year to sign a new Ukrainian gas transit deal, and laid the blame firmly on Ukraine for refusing to extend the agreement that brings gas to Slovakia,

Benchmark European natural gas futures jumped as much as 5% in early trading Friday after Russia's President Putin said it would be impossible to reach agreement on any new transit contract for the flow of natural gas through Ukraine to Europe before year’s end.