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Chevron Corp., operator of the $3.6 billion Frade oil field off the Brazilian coast, is blocked from drilling in the country while a recent spill is examined, the South American country’s oil regulator said.
Chevron’s “negligence” contributed to the spill, and the company needs to pay more attention to safety precautions, the Agencia Nacional do Petroleo said Wednesday in an e-mailed statement.



