Brazil's petrochemical company Braskem SA said in a securities filing on Friday it was "in advanced talks" with authorities in Brazil and the United States related to a corruption investigation known as "Operation Carwash."
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On Thursday, Braskem's parent Odebrecht SA [ODBES.UL], Latin America's largest engineering firm, signed a leniency deal with prosecutors in Brazil's biggest graft case.
(Reporting by Ana Mano. Editing by Jane Merriman)