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.

Hungary has not yet decided whether to support the sanctions rollover due at the end of this month. The EU renews sanctions every six months and requires unanimity among its 27 member countries to do so.