⁍ Prosecutors have alleged at least 12 million reais ($2.14 million) were paid between 2005 and 2015 to Petrobras employees working in Houston, London and Singapore.

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⁍ Police on Tuesday served warrants seeking documents from six people and two companies.

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⁍ Petrobras said in an e-mailed response it only learned of Tuesday’s warrants after the police operation was made public.

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– A sweeping corruption scandal at Brazil’s state-controlled oil company has expanded to include a former executive at Vitol, a Swiss trading firm, Reuters reports. According to court documents, Marcio Dutra Goncalves, who was Vitol’s chief executive in Brazil from 2005 to 2014, secretly recorded hundreds of hours of conversations with former Vitol executives in which they approved payments to Petrobras employees. Prosecutors say Dutra recorded the conversations to aid his recollection of events, a person close to the investigation says. According to court documents, Dutra paid more than $2 million in cash to Petrobras employees to give them information on Vitol’s pricing and strategy in order to win contracts to buy and resell fuel. Petrobras says it was a victim of corruption and only learned of Tuesday’s search warrants after they were made public. The investigation into alleged kickbacks spans trades across four continents. Some Petrobras employees and middle men cited in previous phases of the investigation have pleaded guilty and are cooperating with authorities in exchange for reduced sentences, Reuters has previously reported. Some of the former Petrobras employees and middle men cited in previous phases of the investigation targeting trading firms have pleaded guilty and are cooperating with authorities in exchange for reduced sentences.