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Natural gas prices in Europe skyrocketed on Wednesday after Poland and Bulgaria were hit by a supply freeze from Russia in response to the countries’ refusal to pay for deliveries in rubles. May futures on the Netherlands-based TTF trading hub climbed to $1,374 per 1,000 cubic meters on Wednesday morning, or nearly $125 per megawatt-hour…

German energy firm Uniper is admitting to the possibility of paying for Russian gas in rubles, Tiina Tuomela, the company’s financial director said during a teleconference on Wednesday. “To date, the flow of Russian gas under our existing long-term contract remains untouched. We are in ongoing discussions with Gazprom regarding the implementation of the Russian…