Crude futures prices fell Friday amid conflicting signals from OPEC and an upbeat assessment of energy prices from Federal Reserve Chairman Alan Greenspan.

Light, sweet crude for June delivery on the New York Mercantile Exchange fell 12 cents to settle at $46.80 a barrel. The contract expired Friday. Heating oil and unleaded gas prices each rose by more than a cent to $1.3673 a gallon and $1.4191 a gallon, respectively. On London's International Petroleum Exchange, Brent crude for July rose 15 cents to $48.03.

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