UPDATE 1-Oil prices dip after OPEC-Russia output cut deal, focus swings to implementation

SINGAPORE, Dec 2 (Reuters) - Oil prices slipped on Friday as

some investors opted to cash out after Brent touched 16-month a

high on Thursday, with optimism over this week's OPEC-Russia

accord on cutting output giving way to questions on the

"sticking point" of implementing the deal.

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