Oil prices have fallen amid concerns about the political tensions with Saudi Arabia and as Stock Markets around the world are on the slide.
Brent Crude futures and US crude were both down more than 4% - the biggest percentage drops since July.
Gene McGillian, vice president of market research at Tradition Energy, told Reuters: "Concerns about what's going on in the stock markets and the worries about economic growth has spilled over into the oil markets".
Brent Crude Futures were trading around $76 a barrel and US crude around $66 a barrel.
BBC News.
