"I have sent a signal to Ukrainian leaders that I will stay in the region until we get the gas flowing," Mr Topolanek said.
Moscow has accused Ukraine of stealing Russian gas intended for Europe, but Kiev has repeatedly denied the claims. The two countries have been locked in a bitter contractual dispute over gas prices and transit fees.
Mr Putin says that an agreement spelling out the terms of an EU observers mission in Ukraine is essential for resuming Russian gas shipments across Ukraine.
In a key concession, Ukraine has agreed to Moscow's demand to include Russian observers in the team.
But Russia will not resume supply until the agreement is in writing, an indication of the mistrust between both sides.
Russian and Ukrainian officials continue to argue over other details of the deal.
In the cold
More than 15 countries across central Europe have been hit by the shutdown of Russian supplies and even if an agreement is reached immediately, people won't get their gas back on until at least Monday.
Tens of thousands of homes in central Europe have been left without heating, and schools and businesses closing amid bitterly cold winter weather.
Although both countries had guaranteed that transit supplies to Europe would be unaffected, they were cut off amid mutual accusations between Kiev and Moscow.
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