SEOUL : North Korea has likely received more than 1 million barrels of oil from Russia over an eight-month period this year in breach of U.N. sanctions, according to an analysis of satellite imagery published on Friday by UK-based Open Source Centre and the BBC. North Korean oil tankers have made more than 40 visits to Russia's Far Eastern port of Vostochny since March, the report on the research group Open Source Centre's website said. "Dozens of high-resolution satellite images, AIS (