European Energy Commissioner Guenther Oettinger said he was aiming to arrange further talks to solve the gas pricing row between Moscow and Kiev, which has led Gazprom to reduce supplies to Ukraine.
Kiev failed to meet a deadline this morning to pay off its gas debts in a dispute that could disrupt supplies to the rest of Europe.
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France will host the tournament from June 10 to July 10, with hundreds of thousands of fans set to flock to the country.