Raids were carried out at the headquarters of the committee, which is known as Cojo, and at the offices of Solideo, the body in charge of the Olympic construction sites, a source close to the investigation told AFP.
The reason for the raid was not immediately clear but Cojo said they were "cooperating fully with the investigators in order to facilitate their investigation." This is the first such raid on the organising committee headquarters.
The searches of their premises were conducted by anti-corruption and financial crime investigators and the BRDE, the financial brigade of the Parisian police, another source close to the probe said.
Two years ago two reports by the French anti-corruption agency (AFA) highlighted "risks affecting probity" and "conflicts of interests" which it warned could impinge on the "whiter than whiter" image of the Games that the head of the organising committee, Tony Estanguet, wished for.