U.S. oil ends below 90 USD per barrel

NEW YORK, Aug. 4 (Xinhua) -- Oil prices dropped on Thursday, driven by mounting demand worries.

The West Texas Intermediate for September delivery lost 2.12 U.S. dollars, or 2.3 percent, to settle at 88.54 dollars a barrel on the New York Mercantile Exchange, its first finish below the 90-dollar-a-barrel threshold since February.

Brent crude for October delivery decreased 2.66 dollars, or nearly 2.8 perce