Russia’s top investigative body, the federal Investigative Committee, said on its website Tuesday that it wants to question Mr. Khodorkovsky about the murder of Vladimir Petukhov, the mayor of the Siberian city of Nefteyugansk, where Yukos had its biggest oil-production unit.

Gazprom revived its contract with Italian contractor Saipem (controlled by state-run Eni SpA). The Milan-based company had signed two contracts worth €2.4 bn in total for the construction of an undersea pipeline and support services for construction of a second undersea pipeline, both part of much touted South Stream. The contract terms are now being renegotiated, so as to start construction in time for the 2016 deadline.

If Greece withdraws from the Turkish Stream project, which is planned to transfer Russian natural gas to Europe via the Turkish-Greek border, the U.S. will expect the International Monetary Fund (IMF) to reward Greece

Slovakian Prime Minister Robert Fico met with Russian Prime Minister Dmitry Medvedev in Moscow and proposed a plan that would transfer gas from the Turkish border through Bulgaria, Romania, Hungary and Slovakia, thereby bypassing Greece.

Falling oil prices have resulted in much lower gas prices in many parts of the word. As a result, gas demand is enjoying the tailwind of substantial price drops while the upstream sector is suffering amid large capital expenditure cuts.

Russia's Gazprom plans to start building a pipeline to Turkey this month to get gas to Europe without going through Ukraine, company sources said, although it has no firm agreement with Ankara and faces opposition from the European Union.

Turkmenistan is systematically increasing the volumes of contracts for the gas supply to China. And taking into account the growing demand for gas in China, the gas supplies from Turkmenistan to China will continue to grow.

Russian energy company Gazprom has made it clear that it intends to move forward with the construction of the Turkish Stream natural gas pipeline as quickly as possible, whether or not the project can overcome political obstacles in Europe.

Gazprom has switched to the stage of building the offshore section of the Turkish Stream gas pipeline intended to bring Russian natural gas to Europe via Turkey, Gazprom CEO Alexey Miller said on Friday.

The United States, wading into the international efforts to shape Greece’s economic and geopolitical orientation, is pushing the leftist government in Athens to resist Russia’s energy overtures.