April 2 (UPI) -- A shipment of Russian crude delivered to Cuba is expected to sustain the island's electricity system and key economic activities for about 10 days, officials from the Ministry of Energy and Mines told the Cuban News Agency. The tanker Anatoly Kolodkin, described as part of Russia's so-called shadow fleet and sanctioned by the United States and the European Union, began to unload Tuesday at the port of Matanzas in western Cuba. It carried some 740,000 barrels of crude. State-