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.

Slovakia's coalition government will discuss retaliatory measures to take against Ukraine after it halted the flow of Russian gas through its territory to Slovakia, Slovak Prime Minister Robert Fico said on Thursday.

Russia had already cut off energy supplies to EU countries like Germany and Poland in the wake of its full-scale invasion of Ukraine in February 2022. However, a handful of member countries, including Slovakia, Hungary and Austria, have continued to purchase Russian gas despite a bloc-wide commitment to end reliance on Moscow by 2027.