"The [International Olympic Committee's] chief ethics and compliance officer has asked the Brazilian authorities for full information in order to proceed with the IOC's investigation, and has offered the IOC's full cooperation", the IOC said in a brief statement.
Carlos Arthur Nuzman was arrested yesterday on suspicion of corruption, money laundering and participating in a criminal operation.
The 75-year-old Nuzman was not detained in September but has now been arrested, along with Rio 2016's general director Leonardo Gryner.
The head of the Brazilian Olympic Committee was arrested Thursday as part of an investigation into a bribery scandal in which officials may have paid money to win Rio de Janeiro the 2016 Summer Games, APA reports quoting CNN.
Nuzman appeared relaxed and chatted with the agents as he entered the police station.
Operation Unfair PlayProsecutors say an arrest warrant for the two individuals was issued after attempts were made to hide evidence after the search warrant issued on Nuzman's residence, according to Brazilian outlet G1.
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Nuzman, who has headed Brazil's Olympic Committee since 1995, saw his assets increase 457 percent over the past decade with no clear source for the new income, prosecutors said.
Nuzman is accused of helping to buy the vote of disgraced Senegalese IOC member Lamine Diack - formerly president of the International Association of Athletics Federations. In their statement they cite an email from Papa Massata directly asking Nuzman for help with "the final process", and an email discussing difficulties in bank transfers.
The Rio Games were generally credited with being a sporting and organisational success, but allegations of massive corruption during the preparations and in the naming of the host city have tarnished their legacy. Nuzman is an honorary member of the IOC.
In a statement, the International Olympic Committee said it was fully cooperating with the investigation and conducting its own probe.
The scheme was discovered when prosecutors investigating the mega Lava Jato corruption scheme started looking into former governor Sergio Cabral's illegal activities.
The IOC investigation will be the first test of the newly elected members of the Ethics Commission including chair Ban Ki Moon.