Russia and Serbia have signed energy deal that will hand Russian energy giant Gazprom control of NIS company, Serbia`s oil monopoly.Gazprom is taking a 51% stake in NIS for 400m euros .Under the deal, Gazprom is to build a gas pipeline through Serbia and an underground gas storage facility there. Pictured: Russian President Dmitry Medvedev (r) and Serbian President Boris Tadic (l) signed the agreement in Moscow.