Oil prices extended gains on Monday as investors assessed the impact of Ukrainian drone attacks on Russian refineries that could disrupt its crude and fuel exports, while also eyeing US fuel-demand growth.

Brent crude futures rose 47 cents, or 0.7%, to $67.46 a barrel by 0622 GMT, while U.S. West Texas Intermediate (WTI) crude was at $63.17 a barrel, up 48 cents, or 0.8%.

Both contracts gained more than 1% last week as Ukraine stepped up attacks on Russian oil infrastructure, including the largest oil exporting terminal, Primorsk, and the Kirishinefteorgsintez refinery, one of the two largest refineries in Russia.

“The attack suggests a growing willingness to disrupt international oil markets, which has the potential to add upside pressure on oil prices,” JPMorgan analysts led by Natash

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