MOSCOW/KIEV (Reuters) - Russia shut down all gas flows to Europe through Ukraine on Wednesday, sharpening a dispute that has left industries and homes in southeast Europe without power and disrupted supplies to major economies.

SOFIA/MOSCOW (Reuters) - Russian gas supplies via Ukraine to south-eastern Europe and Turkey were halted on Tuesday and Austria and the Czech Republic reported sharp falls in supplies in a deepening row between Moscow and Kiev.

KIEV/MOSCOW (Reuters) - Russian gas supplies to the Czech Republic and Turkey dropped on Sunday, the latest victims of a deepening row between Russia and Ukraine over debts and pricing.

KIEV/MOSCOW (Reuters) - Russian gas flows to four European Union countries dipped below normal on Saturday after Moscow cut off supplies to Ukraine in a pricing row, and there were no talks in sight to resolve the dispute.

MOSCOW/KIEV (Reuters) - Russian gas kept flowing to European Union states on Friday, a day after Moscow cut off flows to Ukraine in a contract dispute, but importers across the continent were watching for signs their supplies were faltering.

In April 2006, Vanco International, a subsidiary company of Vanco Energy (US), won the tender invited by the Ukrainian Cabinet for the development of the Black Sea shelf oil-and-gas deposits.
The product sharing agreement was signed on October 19, 2007.
The Environmental Protection Ministry decided on April 25 2008, to cancel Vanco Prykerchenska Ltd’s license to develop the shelf. Vanco Prykerchenska Ltd was given the right to explore the license from Vanco International.