Oil prices extended gains on Monday to touch their highest levels since mid-April after top producers Saudi Arabia and Russia pledged to keep supplies down for another month to tighten global markets further and support prices.
Brent crude futures rose 25 cents, or 0.3%, to $86.49 a barrel by 0023 GMT, while U.S. West Texas Intermediate crude was at $83.05 a barrel, up 23 cents, or 0.3%.
