Oil extends losses on worry over possible supply increase from OPEC
Brent crude dropped 78 cents, or 1.2%, to $62.91 a barrel by 0138 GMT, after losing 1.1% the previous day. U.S. West Texas Intermediate (WTI) crude slid 74 cents, or 1.2%, to $59.90 a barrel, having lost 1.4% on Monday.