Fifa president Sepp Blatter has been formally questioned by Swiss prosecutors as a criminal investigation into his actions was launched.
The Swiss Office of the Attorney general said the interrogation took place at Fifa headquarters in Zurich, where his office was searched and data seized.
A statement said:
Swiss criminal proceedings against the president of Fifa, Mr Joseph Blatter, have been opened on 24 September 2015 on suspicion of criminal mismanagement and - alternatively - misappropriation.
On the one hand, the OAG suspects that on 12 September 2005 Mr Joseph Blatter has signed a contract with the Caribbean Football Union (with Jack Warner as the president at this time); this contract was unfavourable for Fifa. On the other hand, there is as suspicion that, in the implementation of this agreement, Joseph Blatter also violated his fiduciary duties and acted against the interest of Fifa and/or Fifa Marketing & TV AG.
Additionally, Mr Joseph Blatter is suspected of a disloyal payment of 2 million CHF [Swiss francs] to Michel Platini, President of Uefa, at the expense of Fifa, which was allegedly made for work performed between January 1999 and June 2002 ; this payment was executed in February 2011.
The statement added:
Representatives of the OAG interrogated the defendant Joseph Blatter following a meeting of the Fifa executive committee. At the same time, Michel Platini was heard as a person asked to provide information.
As for all defendants, the presumption of innocence applies for Mr Joseph Blatter.
Fifa issued a statement saying it had been cooperating with the OAG since arrests of Fifa officials were made in May.
Since 27 May 2015, Fifa has been cooperating with the Office of the Swiss Attorney General (OAG) and has complied with all requests for documents, data and other information. We will continue this level of cooperation throughout the investigation.
Today, at the Home of Fifa, representatives from the Office of the Swiss Attorney General conducted interviews and gathered documents pursuant to its investigation. Fifa facilitated these interviews as part of our ongoing cooperation.
We will have no further comment on the matter as it is an active investigation.