Slovakia has alternative gas supplies but Fico, who has ended military aid to Ukraine and sought warmer relations with Moscow, says Slovakia will lose its own transit revenues and pay additional transit fees to bring in non-Russian gas. He has also said European gas and power prices would rise as a result of Ukraine's actions.

Despite EU efforts to reduce dependence on Russian fossil fuels, Slovakia remains reliant on Russian gas under a long-term contract with Russia's state-owned energy giant Gazprom. Switching to alternative supply routes could cost Slovakia an additional €220 million ($229 million) in transit fees.