Paris Saint-Germain chairman Nasser Al-Khelaifi is under investigation for alleged bribes relating to media rights for the 2026 and 2030 World Cups.
The probe stems from a wider criminal inquiry into former FIFA secretary general Jerome Valcke, who was banned from football for 12 years by the governing body's ethics committee in 2016.
The Paris offices of beIN Sports, the company founded by Al-Khelaifi, was raided on Thursday, with the beIN Media group subsequently issuing a statement to 'refute all accusations' made by Switzerland's Office of the Attorney General (OAG).
"The company will fully cooperate with the authorities and is confident as to the future developments of this investigation," the statement added.
OAG had earlier released their own statement on the matter, which read: "It is suspected that Jerome Valcke accepted undue advantages from a businessman in the sports rights sector in connection with the award of media rights for certain countries at the FIFA World Cups in 2018, 2022, 2026 and 2030 and from Nasser Al-Khelaifi in connection with the award of media rights for certain countries at the FIFA World Cups in 2026 and 2030."
Al-Khelaifi was responsible for bringing Neymar to PSG for a world-record £198 million fee from Barcelona during the off-season and has been described by French newspaper L'Equipe as "the most powerful man in French football".