Published: Nov 23, 2011 9:56 PM EST

SAO PAULO (AP) - Brazilian regulators have temporarily banned Chevron from drilling for oil in the nation.
    
The National Petroleum Agency's decision comes after a recent oil leak at one of Chevron's offshore drilling sites.
    
More than 110,000 gallons leaked into the Atlantic Ocean about 230 miles (370 kilometers) off the northeastern coast of Rio de Janeiro state.
    
The regulator says Wednesday that Chevron is banned from drilling until the causes of the leak are fully known and corrected.
    
Chevron has said it underestimated the pressure of an underwater oil reservoir while drilling on Nov. 7. That allowed oil to rise up a bore hole and make its way to ocean's surface.
    
Regulators say the leak is now under control.

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