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.