Crude oil prices hit new record highs in Friday's trading.
In New York, crude oil for future delivery hit an all-time high of $53.25 a barrel. London's Brent crude oil also set a new record during the day.
The Bloomberg financial news service says prices rose after rough weather in the Gulf of Mexico forced temporary closure of a key facility that unloads about 10 percent of U.S. petroleum imports.
The disruption comes at a time of tight supplies of crude oil and strong demand as companies try to build stocks of heating oil for winter in the northern hemisphere.