Russia has begun shipping large quantities of oil to Cuba for the first time this century, sources said, as supplies to the island from crisis-wracked Venezuela have dwindled. A Russian oil tanker with 249,000 barrels of refined products is due to arrive in Cuba on May 10, according to Reuters shipping sources and others, bringing back memories of when the Soviet Union supplied all of the Communist-run Caribbean island’s energy needs. More tankers apparently will follow. Rosneft, Russia’s state oil company, announced on Wednesday it had signed an agreement with Cuba’s state-run Cubametals to supply 250,000 tonnes of oil and diesel fuel, without providing further details. The news is sure to raise eyebrows in Washington as its tense relations with Moscow continue, […]