Poland has resumed deliveries of gas to Ukraine that had been halted after its own supplies from Russia dropped this week, the state pipeline operator said Friday.

The statement by Gaz-System S.A. suggests gas flows from Russian supplier Gazprom are once again meeting Poland's daily demand, but there was no immediate confirmation of that from state gas company, PGNiG.

Head of PGNiG, Mariusz Zawisza, told Polish PAP agency that the company raised its demand for Russia gas in recent days, due to market needs.

"We place gas orders according to our needs. We stick to the provisions of the contract, and we do not exceed the maximum daily volumes," Zawisza said, without offering any figures.

The contract is based on a volume range, but the details are not made public.

The spat between Poland and Russia came amid concerns that Moscow is ready to use its energy exports as a political weapon over the crisis in Ukraine.

"We do not treat the situation as a crisis," Zawisza said. "It is just one incident."

Zawisza said that after Germany and Italy, Poland's is Gazprom's third largest European client.

Germany and Austria had also reported a drop in Russian gas flows this week.