Tags: Brazil

A Brazilian police officer investigating a kick-back scheme at state-run oil company Petrobras said the total amount of money involved could exceed $28 billion, making it the country's biggest-ever money laundering probe.

When federal investigators first identified signs of corruption at Petrobras in 2009, Dilma Rousseff insisted Brazil's state-run oil company had nothing to hide.

Brazil's state-run oil firm Petrobras said on Tuesday it may increase the number of foreign companies it works with after banning several Brazilian contractors because police have implicated them in a kickback scheme at the company.