REUTERS

Russian gas giant Gazprom declined immediate comment, as reported by Reuters.

The gas transit deal between Russia and Poland, dating back to the 1990s, expired on May 17 as Warsaw aligns its energy regulations with European Union rules and curbs its decades-old dependence on Russian fuel.

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Poland's gas grid operator Gaz-System reiterated that after the transit deal expired it started selling capacity on the Yamal pipeline via auctions.

It said that the capacity booked for Sunday was significantly lower than for the previous periods and that "there is no need for the pumping stations to work for 24 hours a day at such low orders for the transit service."

According to Gaz-System, clients booked 4 million kWh/h each for Sunday and Monday, compared to around 12.5 million booked for Saturday.