Michel Platini is now a suspect in the Swiss investigation into a payment he received from former FIFA president Sepp Blatter, it has emerged.

The criminal probe into the payment made in 2011, while Platini was president of European football's governing body UEFA, began in September 2015 but was extended this month to investigate the Frenchman's part in the affair.

In documents seen by the PA news agency, Swiss federal prosecutors state Platini is suspected of being an accomplice to acts of criminal mismanagement, misappropriation and forgery of documents.

Platini claimed the payment of two million Swiss francs (€1.88m) was money owed to him from his time as Blatter's personal adviser between 1998 and 2002.

In December 2015, three months after the Swiss attorney general opened the criminal investigation, FIFA's ethics committee said the payment was against its rules and banned both men for eight years.

FIFA's appeals committee confirmed the decision of the ethics committee but reduced the suspension to six years, with the Court of Arbitration for Sport cutting it to four years in 2016.

Platini, whose suspension ended in October of last year, had an appeal to the European Court of Human Rights against his football ban dismissed in March of this year, with one aspect of the complaint described in the judgement as "manifestly ill-founded".

As well as the Platini payment, the Swiss investigation, which began in 2015, is examining a media rights agreement struck by Blatter in 2005 and a loan of one million US dollars to the Trinidad and Tobago Football Association in 2010, which was subsequently converted into a grant.

Platini and Blatter have consistently denied any wrongdoing, and have not been charged by the Swiss prosecutors. FIFA has declined to comment on the latest development