Russia in the European energy sector
Gazprom announces that it will stop delivering natural gas to Poland via the Yamal–Europe pipeline and to Bulgaria as both countries rejected Russia's demand to pay for the fossil fuel supply in Russian rubles. Poland does not expect to experience disruptions from the suspension of natural gas deliveries. However, the suspension of Russian gas deliveries to Bulgaria "poses a serious challenge to the security of supply to the country" as Bulgaria is almost completely dependent on Russian gas.
Sources: Deutsche Welle Reuters Rzeczpospolita