Ukrainian President Volodymyr Zelenskiy on Monday criticised what he said was Slovak Prime Minister Robert Fico's lack of desire to end his country's dependency on Russian natural resources as a "big security issue" for Europe and Slovakia.

Slovak Prime Minister Robert Fico met Russian President Vladimir Putin in Moscow on Sunday. The premier's trip came a little more than a week before the expiry of a transit contract between Moscow and Ukraine that allows about 15 billion cubic meters of Russian pipeline gas per year to be shipped to a number of European nations.

Ukrainian President Volodymyr Zelenskiy criticized Slovak Prime Minister Robert Fico for maintaining Slovakia's dependency on Russian natural resources. Zelenskiy sees this as a significant security threat to Europe.