SINGAPORE, Aug 5 (Reuters) - U.S. crude extended losses on Friday, heading for its biggest weekly drop in three months, after fears of an economic slowdown drove investors to the exits in a commodities sell-off that has erased oil's gains in 2011.
U.S. crude
U.S. crude has plunged more than 10 percent this week, while Brent has dropped more than 9 percent.
(Reporting by Alejandro Barbajosa)