Oil prices set for first weekly fall in six on oversupply worries

Oil prices were mixed on Friday after recent declines, but were on track for the first weekly fall in six weeks, under pressure from surging U.S. supplies and doubts over Russian support for continuing a cut in crude output.
Brent crude futures (LCOc1), the international benchmark for oil prices, were at $61.23 per barrel at 0616 GMT, down 13 cents from their last close.