Russia pumped gas on Monday to European customers via Ukraine for one of the last days before a key transit deal expires at the end of the year, marking the almost complete loss of Russia's once mighty hold over the European gas market.

Russia's gas supply to Europe via Ukraine is set to end with the expiration of a key transit deal. The deal's end marks Russia's decline in the European gas market following the Ukraine war. The fallout has impacted the EU's energy prices and sparked geopolitical tensions.

Leaders of the two countries have exchanged accusations and threats ahead of an anticipated halt to Russian gas flows via Ukraine

Now Slovakia is urging the European Commission to address the looming halt of Russian gas supplies through Ukraine, saying the economic impact on the EU will far outweigh the effect on Russia. Ukrainian President Volodymyr Zelensky is set to block Russian gas flows through his country from January,

Ukraine will quadruple gas transit tariffs for its domestic customers starting Jan. 1 when a deal to transport Russian gas through Ukrainian pipes expires, the National Energy Regulatory Commission said during a meeting on Dec.