Oil prices fell on Thursday with a decline in factory output in China and Japan, alongside supply cuts led by producer club OPEC.
International Brent crude futures were at 66 dollars 4 cents per barrel ,down 35 cents from their last close.
U.S. West Texas Intermediate crude oil futures were at 56 dollars 78 cents per barrel, down 16 centsfrom their last settlement.
The decline in prices were triggered by surging American crude oil production, which has risen by more than 2 million barrels per day over the last year.
