, UEFA President, arrived Wednesday around 6:30 GMT outside the offices of the Public Prosecutor of the Canton of Vaud, where it should be understood by the public prosecutor to investigate the dispute between FC Sion and the European Union football, said a journalist from AFP.
Michel Platini arrived on foot, passing by without the media reporting.
The communications director of the UEFA Alexandre Fourtoy said for his part that "the prosecutor receives the President to ask for explanations and it is understood as such this morning (Wednesday)." "This is a closed-door hearing today Platini is understood as an individual," he added.
The president of FC Sion Christian Constantin has meanwhile arrived at 6:46 GMT.
He did not comment to the media.
FC Sion is in litigation in several jurisdictions in Switzerland with FIFA and UEFA for failing to comply with a ban on recruitment of players.
The ban led to his exclusion from the Europa League, a competition under the auspices of UEFA organization based in Nyon in the canton of Vaud.
FC Sion then to court in the canton of Vaud who ordered UEFA to return to the Swiss club in the Europa League, otherwise the proceedings will be fined.
But UEFA has not complied with the interim or superprovisional Swiss Civil Justice, pending a final decision, including the Court of Arbitration for Sport (CAS) ... jurisdiction that does not want to enter Zion.
"The Europa League has rules that are public. The CAS is one of those rules, can we play in the Europa League if you do not follow the rules?" Asked Mr. Fourtoy.
No charge is brought against Michel Platini, but must explain how the competition is organized and the importance of respect for the rule sports.
The secretary general of the proceeding, Gianni Infantino, must also be heard by the prosecutor during the morning.