Oil prices finished lower on Thursday after data showed a rise in US crude inventories, amid concerns about the outlook for global demand recovery.
Brent crude futures for November delivery declined by 73 cents, or 1.8%, and closed at $40.06 per barrel.
Meanwhile, the West Texas Intermediate (WTI) crude futures for October delivery settled lower by 75 cents, or 2%, at $37.30 per barrel.