Ukrainian Energy Minister Yuri Prodan said on Wednesday reverse gas flows from the European Union to Ukraine had fallen because of opposition from Russian gas producer Gazprom.

• July 23, 2014

U.S. Secretary of State John Kerry said on Sunday major differences persist between Iran and six world powers negotiating on Tehran's nuclear program, with a week to go before a deadline for a deal.

• July 14, 2014

Russia said on Thursday talks between world powers and Iran were "extremely difficult" but Moscow still hoped a long-term deal to end the standoff over Tehran's nuclear program could be reached by July 20.

• July 10, 2014

Ukraine began preparing on Friday for Russia to cut off its gas after talks on long-running price dispute broke down, raising the prospect of supplies to the European Union also being disrupted from Monday.

• June 13, 2014

Russia and Ukraine resumed efforts to settle their gas price row on Wednesday after Kiev rejected a proposal that would have cut its gas bill by around a fifth and averted a possible suspension of supplies that would also hit the rest of Europe.

• June 11, 2014

President Vladimir Putin said on Wednesday that Russia should consider recapitalizing state gas company Gazprom after a $400 billion deal with China which will require multi-billion-dollar investments in pipelines and new fields.

• June 4, 2014

Ukraine's state gas company Naftogaz said on Tuesday no real progress was made with Russia's Gazprom over its gas debt or on price in talks in Berlin aimed at settling a dispute that threatens to disrupt gas flows to western Europe.

• May 27, 2014

Russia's landmark deal to supply natural gas to China will affect prices in Europe and have an impact on international liquefied natural gas projects, the chief executive of state-run Gazprom said on Friday.

• May 23, 2014