Crude prices fell Monday after a rally triggered by Saudi output fears.

Crude surged above 66 U.S. dollars a barrel late Friday after Saudi Arabia announced the arrests of 172 Islamic militants, some of whom allegedly planned to attack oil fields.

On Monday, Light, sweet crude for June delivery fell 81 cents to 65.65 dollars a barrel on the New York Mercantile Exchange.

Brent crude for June delivery dropped 59 cents to 67.82 dollars a barrel on London's ICE Futures exchange.

Source: Xinhua