Oil prices hit an all-time high above $115 a barrel Thursday amid concerns about sagging U.S. gasoline supplies ahead of the peak demand of the Northern Hemisphere summer. The U.S. Energy Department said Wednesday that inventories of gasoline fell 5.5 million barrels last week, a much bigger decline than forecast by analysts surveyed by Dow Jones Newswires. Crude inventories fell 2.3 million barrels last week, the department's Energy Information Administration also reported, while analysts expected a gain.

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