A row over the end of Russian gas flows via Ukraine has intensified as Hungarian Prime Minister Viktor Orban threatened to block the next rollover of EU sanctions against Russia unless Brussels helps to achieve a restart of supply.

Long reputed to be Russia-friendly, Hungarian Prime Minister Viktor Orban has often railed against the continuation of the EU sanctions, claiming that they impose an intolerable burden on the Hungarian economy and provide no solution for the carnage in Ukraine.

Hungarian Prime Minister Viktor Orban threatened on Friday to block the next rollover of EU sanctions against Russia unless Brussels helps achieve a restart of Russian gas transit via Ukraine, which was halted on Jan.

Hungary wants the European Union to intervene in a gas dispute it has with Ukraine, a potential sign of friction in the bloc’s upcoming discussions over renewing sanctions against Russia.

The statement was read to EU ambassadors on Monday morning, ahead of a meeting of foreign ministers to discuss extending sanctions against Russia, which are renewed every six months. "Hungary is delaying the extension of the bloc’s sanctions against Russia,

Hungary wants the European Union to persuade Ukraine to resume gas transit from Russia to Europe, Prime Minister Viktor Orban said on Friday, signalling a tough debate as the EU seeks to extend its sanctions against Russia over the coming week.

Hungarian Foreign Minister Péter Szijjártó, following Prime Minister Viktor Orbán, has declared that Budapest will block the next extension of EU sanctions against Russia unless Ukraine "refrains from measures that harm Hungary’s energy security".