Naftogaz CEO Oleh Dubyna earlier said that Ukraine would pay for Russia's November gas deliveries on time.
"I can say that we'll pay for November, December and January and everything will be ok," he said.
Ukraine's Naftogaz paid for Russian natural gas deliveries in October on schedule.
Russia, which supplies around one quarter of Europe's gas, briefly shut down supplies via Ukraine's pipeline system at the start of the year amid a dispute unpaid bills and new prices.
The conflict was resolved in January, when Putin and Tymoshenko reached a deal on imports and transit for 2009.
Ukraine transits around 80% of Russia's Europe-bound gas.
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