Oil Prices Hit $75 on Tuesday, the highest level in nearly three and a half years, as fears mounted over the prospect of new US sanctions on Iran.
The US will decide by 12 May whether to abandon a nuclear deal with Iran and re-impose sanctions.
Such a move on the third-biggest oil producer in the Opec cartel threatens to further tighten global supplies.
Oil prices have been rising since the 14 nations in Opec, as well as other producers including Russia, decided to restrict output last year.
BBC News.