FILE - In this Tuesday, March 4, 2014 file photo, a monument to Ukrainian poet and writer Taras Shevchenko is silhouetted against an apartment building with a sign advertising Russia's natural gas giant Gazprom, in Moscow, Russia. Poland has resumed deliveries of gas to Ukraine that it had halted after its own supplies from Russia dropped this week, the state pipeline operator said Friday, Sept. 12, 2014. The statement by Gaz-System S.A. suggests gas flows from Russian supplier Gazprom are once again meeting Poland's daily demand. State gas company, PGNiG, said that on Thursday it still registered some deficit compared to the ordered amount, but that the shortfall was lower than on Wednesday, when supplies were 45 percent short of demand. 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." (AP Photo/Alexander Zemlianichenko, file)

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