Gazprom agreed to postpone the dialogue with " Naftogaz " of 5 to 6 June at the request of the Ukrainian side. First Russian Company has agreed to postpone the deadline for the settlement of the question of payment before June 10. Thus, the period of the transfer of gas supplies to Ukraine on an advance payment transferred to eleven June. Over the last few weeks the price for gas rose from $268, 5 to $485, 5 per thousand cubic meters. This price Kyiv considers the political, and the contracts are onerous. The head of " Naftogaz " Andrey Kovalev said that in case of the beginning of the gas war with Russia is a high probability of termination of the transit of natural gas via Ukraine to the European Union.