Kazakhstan is to extend a ban on fuel exports, Minister of Oil and Gas Sauat Mynbayev said Wednesday."The fuel export ban will be extended," he said. "We have agreed on volumes for December. As for next year's supplies, we are working with the Russian authorities. We have not signed a joint document yet."The Kazakh government in November 2010 extended the ban on export of certain petroleum products until the end of this year. Affected products include gasoline and kerosene.