Russian President Dmitry Medvedev (L) speaks with Gazprom CEO Alexei Miller during their meeting at the Kremlin in Moscow on September 7, 2009. President Dmitry Medvedev accused Ukraine of seeking changes to a contract for the transit of Russian gas across its territory, the latest row over energy between the two fueding states. Medvedev told the head of state-run Russian gas giant Gazprom that Russia would not accept any move from the Ukrainian authorities to demand advance payment for the transit of Russian gas to European consumers via its soil.