Michel Platini, ex-UEFA president, detained over 2022 World Cup award
The National Financial Prosecutor's office confirmed that 63-year-old Platini had been detained.
Platini was head of European football's governing body until 2015 when he was handed an eight-year ban over ethics breaches that was later reduced to four years on appeal.
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Hide AdThe ban expires this October and Platini has persistently denied any wrongdoing.
Platini and former FIFA boss Sepp Blatter were banned for eight years by FIFA's ethics committee in December 2015, although a FIFA appeal body reduced that to six years, for a "disloyal payment" of £1.5 million paid by Blatter to Platini.
The pair then made separate appeals to the Court of Arbitration for Sport (CAS), which upheld Blatter's sanction but cut a further two years off Platini's.
Blatter has always denied any wrongdoing.