Etienne Thobois, director general of Paris 2024, and Edouard Donnelly, executive director of the organizing committee, were both visited by police this week.
AFP also reports that a raid on an office of a consulting company, which the two men founded, was carried out on Wednesday.
Earlier this week, a raid was also made on the Olympic organizer’s office in Paris.
A spokesman for the prosecutors says the suspicions relate to illegal conflict of interest, misuse of public funds and favoritism in procurement contracts.
The 2024 Olympics will be inaugurated on July 26 and the competitions will run until August 11.