Oil edged down on Friday after a gasoline-led rally, but supply risks from the closure of a shipping channel in the United States to a strike by oil service workers in Norway provided support.
U.S. light crude <CLc1> for August was down 16 cents at $70.68 a barrel by 0400 GMT, having risen by $1.50 over the last two sessions in a gasoline-led rally. London Brent crude <LCOc1> traded 18 cents lower at $69.77 a barrel.
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