Fico made the comments in a video posted on his Facebook page but did not provide more details and the government office did not immediately respond to a request for comment.

Fico has accused Kyiv of damaging Slovakia by not extending a transit deal for Russian gas that expired at the end of 2024, and has threatened to cut electricity flows to Ukraine and reduce aid for its refugees.

Slovakia has continued receiving gas coming via Hungary, which receives Russian gas via Turk Stream, since the halt of flows from Ukraine, according to Slovak gas transmission network operator Eustream data.

Fico said that the halt from Ukraine has cost it €500 million in transit fees and €1 billion for higher gas prices. He is due to meet European Commission officials in Brussels on Thursday to discuss the halt to Ukraine gas transit.

Ukrainian President Volodymyr Zelenskyy has accused Fico of opening a "second energy front" against Ukraine on the orders of Russia.