Oil slumped around 2% on Monday after news from the Suez Canal that salvage crews have managed to move the giant container ship that has been clogging up the vital global trade passage for nearly a week.
Brent oil was down $1.19, or 1.8%, at $63.38 a barrel by 0658 GMT. U.S. crude fell $1.34, or 2.2%, to $59.63 a barrel.
The stranded container ship Ever Given has been partially floated and straightened in the Canal, with further tug operations set to resume when the tide rises later on Monday.
Hundreds of other container ships, bulk carriers and oil-laden tankers remain backed up at both ends of the canal, but news of the ship's movement immediately sent oil prices sharply lower after they had traded slightly down for the morning.
Prices have swung wildly in the last few days as traders and investors tried to weigh the impact of the blockage of a key trade transit point and the broader effect of lockdowns to stop coronavirus infections.
That market volatility is set to continue, said Jeffrey Halley, senior market analyst at OANDA.
"Given the volatility last week, Brent looks set to move to the lower end of its $60.00 to $65.00 a barrel range," he said, while U.S. oil is "likely to drop to the lower side of its $57.50 to $62.50 a barrel weekly range."The market is getting some support from expectations that the Organization of the Petroleum Exporting Countries and its allies will maintain lower output levels when they meet this week.