Ukraine threatened to block Russian oil and gas supplies to Europe in new sanctions against Vladimir Putin ’s government, which it blames for a separatist uprising that has ravaged the country’s east. Ukraine, which no longer receives any gas from Russia but acts as a conduit for its neighbor’s European customers, is considering a “complete or partial ban on the transit of all resources” across its territory, Prime Minister Arseniy Yatsenyuk told reporters today in Kiev. It may also ban Russian planes from its airspace and cut defense-industry cooperation. “There’s no doubt that Russia will continue its course — started a decade ago — aimed at banning imports of Ukrainian goods, limiting cooperation with Ukraine, pressure and blackmail,” Yatsenyuk said. “In the most negative scenario for Ukraine, losses during the first year may reach $7 billion, not only because of sanctions but also because of the Kremlin’s aggressive policy.” […]