(VOVworld) - The Russian aviation airstrikes in Syria have caused a twofold decline in Islamic State’s revenue from illegal oil trade, a large part is exported to Turkey.

Russian air strikes on IS makes their oil revenue declined to 1.5 million USD a day (photo:jihadwatch.org)

Chief of the Main Operations Directorate of the Russian General Staff Sergey Rudskoi said on Wednesday that the revenue of IS reached 3 million USD a day, equivalent to 2 million USD per year. After two months of airstrikes delivered by the Russian aircraft on the terrorists, their oil revenue declined to 1.5 million USD a day. Russian aircraft have destroyed 40 oil refining complexes, 23 oil pumping stations, and more than 1,000 oil tank trucks.