Bolloré, who has business interests in West Africa, is suspected of corrupting foreign officials and complicity in corruption, his lawyer said.
French billionaire Vincent Bolloré, whose Bolloré Group owns a 20 percent stake in media giant Vivendi, has announced his son Yannick is to replace him as chairman of Vivendi's supervisory board, a hereditary handown after corporate raider Bolloré senior's four years at the helm.
The media group's move comes after government pressure on Dailymotion owner Orange to keep the Youtube competitor in French hands.
After a month-long fierce bidding war against Bouygues, Numericable buys Vivendi's telecoms subsidiary SFR for 13.5 billion euros.
Head of French public-sector investment body says he would be prepared to back Bouygues in tussle for control of mobile phone firm SFR.
Move is blow to telecoms firm Bouygues who had also bid for its mobile phone rival, an option also backed by industry minister Arnaud Montebourg.