Ammon News - 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 U.S. 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 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.

Last week, softer job-creation data and rising inflation in the U.S. raised concerns about economic growth in the world's largest economy and oil consumer, even as the Federal Reserve is likely to cut interest rates during its September 16-17 meeting.

Reuters