Analysts said the decline in crude prices at futures trade was primarily after it fell in the Asian trade ahead of key Chinese manufacturing data for clues about demand in the world's top energy consumer.
Meanwhile, West Texas Intermediate crude for October delivery eased 31 cents to USD 92.10, while Brent crude for November was down 44 cents to USD 97.95 a barrel in late-morning trade on the New York Mercantile Exchange.