Michael Platini has been detained by French police in connection with the awarding of the 2022 World Cup to Qatar.
According to news agency Reuters, the former Uefa president is being investigated by prosecutors for suspected corruption and bribery.
Platini, 63, was head of European football's governing body until he was banned in 2015 for ethics breaches.
The former France midfielder and three-time Ballon d'Or winner has always denied any wrongdoing.
Platini was banned over a 2m Swiss francs (£1.3m) "disloyal payment" from then Fifa president Sepp Blatter, who was also banned from football for his part in the matter. Blatter has also always denied any wrongdoing.