Oil heads for first weekly loss in three as supply glut looms

SINGAPORE (Reuters) -Oil prices extended their decline into a third session on Friday, heading for a weekly loss for the first time in three weeks as supply expectations grow and a surprise build in U.S. crude stocks adds to demand concerns.

Brent crude futures fell 10 cents, or 0.15%, to $66.89 a barrel by 0420 GMT, while U.S. West Texas Intermediate crude fell 13 cents, or 0.20%, to $63.35.