Oil fell Thursday as traders assessed potential supply disruptions following attacks on ships passing through the Strait of Hormuz.
A Singapore-registered ship was sunk in the critical Strait of Hormuz, and Iran said it was "counting the moments" until it can strike U.S. warships.
Brent crude for December delivery dropped 1.66% to $104.31 a barrel, while West Texas Intermediate futures for November fell 1.09% to $94.05 per barrel.