In an interview with a RIA correspondent Thursday, Mr Ryazanov cited repeated cases of Ukraine ignoring Gazprom's protests against unauthorized pumping of Russian natural gas from underground storages.
His comment follows a statement by Ukrainian officials about the company's alleged unwillingness to meet its obligations under an intergovernmental agreement on the transit of Russian natural gas across Ukraine through the year 2013.
As the senior Gazprom official pointed out, specific amounts of natural gas to be supplied to Ukraine in exchange for its transit services, as well as concrete terms of the supply, including the selling and delivery prices, vary from year to year, and are to be determined through negotiations.
"We have put forward our terms as to the gas prices for Ukraine in 2006. These terms are fully in line with the agreements reached with Ukraine on the transfer to monetary payment for gas transit and supplies starting next year, with the prices and tariffs to be brought to European levels," Mr Ryazanov reported. The Ukrainian side has said it will reply in two weeks' time, he added.
