But analysts say the fossil fuel’s boom will probably be short-lived as the turn to renewable energy picks up

The expanding use of private military and security companies in recent years suggests that they may take a leading role as the Ukraine conflict develops

Armed men burst into the headquarters of Ukraine’s energy firm Naftogaz on Wednesday in what the security service said was part of a criminal inquiry.

An abrupt rise in Russian gas prices will undermine Ukraine’s economic and energy security and leave some enterprises on the brink of insolvency.

The EU raised the stakes with Ukraine and Russia on Wednesday by threatening to ditch them as gas suppliers and to promote court action against them.

Russian gas delivered into Ukraine’s pipelines to end an embargo on Europe cannot be transported onwards, officials said on Tuesday.

Ukraine, Russia and the EU struck a monitoring agreement on Sunday that should enable the resumption of Russian supplies to Europe.

The European Union will hold talks with Russia on Saturday to finalise a gas monitoring deal to allow the resumption of gas supplies to Europe.

Russia’s gas monopoly Gazprom said a deal to monitor gas exports via Ukraine would be signed on Friday, allowing for the resumption of supplies.

Stakeholders in the transport of Siberian gas to Europe should form a consortium to manage the pipelines, a leader of German business said on Friday.

Russia and Ukraine held talks over a solution to the escalating gas dispute, it was reported on Thursday.

Russian gas supplies to Europe through Ukraine shut down on Wednesday, leaving growing numbers of EU members without fuel in freezing temperatures.

Russia halts gas supplies to the Balkans, Turkey and south-eastern Europe, while flows to Austria drop by 90% in a deepening price row

Russian gas flows to four European Union countries were below normal levels on Saturday after Moscow cut off supplies to Ukraine in a pricing dispute.

Russia cut off the gas to its neighbour Ukraine on Thursday after a contract dispute but increased supplies to other European states.

Russia was preparing to turn off gas deliveries to neighbouring Ukraine on Thursday, raising the spectre of disruptions to European Union supplies.

Russia state gas monopoly Gazprom has accused Ukraine of "blackmail," saying it had threatened to confiscate gas en route to delivery to Europe.

Russian gas monopoly Gazprom accused the Ukraine on Wednesday of planning to siphon off gas that Russia transits through Ukrainian territory to the European Union, as a payment…

Russia and Ukraine slid towards a new gas war on Tuesday as Moscow slashed supplies to the ex-Soviet republic by 50% and Ukraine’s state gas company said it may cut deliveries to…

The West cast doubt on Russia’s presidential election on Monday after Dmitry Medvedev won a landslide victory and vowed to follow the course set by outgoing leader Vladimir…