TOKYO: Oil fell amid worries over the outlook for demand after the latest signs that international trade disputes have been dragging on the global economy, although tensions in the Middle East offered some support to prices.
Brent crude futures were down 21 cents, or 0.3%, at $63.90 a barrel by 0022 GMT.
They fell 12 cents on Monday.
U.S. West Texas Intermediate crude futures were down 20 cents, or 0.4%, at $57.46 a barrel.
They rose 15 cents in the previous session.
Oil prices are being pressured by ongoing worries about demand as the U.S.-China trade war, heading into its second year, dampens prospects for global economic growth.