Russian energy giant Gazprom on Thursday defended gas cuts to Europe as prices soared and tensions raged between Russia and the West over Ukraine.Gazprom CEO Alexei Miller said that Moscow will play by its own rules after cutting daily gas supplies to Germany and Italy. "Our product, our rules. We don't play by rules we didn't create," Miller said during a panel discussion at the Saint Petersburg International Economic Forum in Russia's second city. Earlier this week, Gazprom slashed its natural gas deliveries via the Nord Stream pipeline, after saying Germany's Siemens had delayed the repair work of compressor units at the Portovaya compression station. "For now, there is no way to solve the problem that arose with the compressor station," Miller said. "Siemens is still silent, trying to find a solution." Italian energy giant Eni also reported problems, saying it will receive only 65 percent of the gas requested Thursday from Gazprom.