The price of crude oil dropped sharply Wednesday as traders worried that economic troubles in Europe, and some disappointing economic reports in the United States, might slow demand.

In New York, the cost of a barrel of crude oil for future delivery fell more than $4, dropping below $95 a barrel for a while. The price of London's Brent crude oil also fell.

Experts say some of the price drop is due to an increase in the value of the dollar as investors, worried about the impact of Greek financial troubles on Europe, bought up dollars.

The drop in prices is unusual because it comes the same day as a report showing a decline in U.S. inventories of crude oil. A report showing a falling supply of a key commodity generally prompts a price increase.