Oil prices fell on Friday following reports that President Trump pledged not to attack Iran before the U.S. midterm elections.
December Brent crude futures dropped 1.3% to $102.90 a barrel and WTI fell 1.4% to $89.50 a barrel, after rising 4.4% on Thursday.
Hurricane Isaias shut in 1.28 million barrels per day, accounting for 62.9% of offshore oil output in the Gulf of Mexico as of Thursday morning.