Zam. the head of "Gazprom" Alexander Medvedev said it was difficult to predict the export of gas from Russia to Ukraine in the summer of 2015, as Ukraine incessantly changes its requests for production and delivery. "It is difficult to predict (supplies of gas to Ukraine in the summer), because our colleagues in Ukraine, change of the application, furthermore, we give them this right is provided ", - said Medvedev at a press conference in the Russian capital. Medvedev likewise once again clarified the risks of gas transit to the European Union through the territory of Ukraine, in connection with the insufficient level of gas in underground storage of Ukraine.