Oil prices fell more than 1% as fresh coronavirus lockdowns revived worries about demand for oil products, even as tug boats struggled to move a stranded container ship blocking crude oil carriers in the Suez Canal.
Brent crude futures slid 87 cents, or 1.4%, to $63.54 a barrel at 0405 GMT, after jumping 6% overnight.
US West Texas Intermediate (WTI) crude futures dropped by $1.02, or 1.7%, to $60.16 a barrel, after climbing 5.9% overnight.
Prices, which tumbled earlier in the week on worries about tighter pandemic curbs in Europe and vaccine delays stalling fuel demand growth, sharply reversed on Wednesday on news of the grounding in the Suez Canal, potentially blocking 10 tankers carrying 13 million barrels of oil.