The prosecutor general's office said Benfica Vice President Fernando Tavares was also a suspect in the case, along with a high-ranking judge and nine other people, five of whom were detained in a police operation on Tuesday.
Benfica confirmed on Thursday they had talked to Manchester City's Swedish coach Sven-Goran Eriksson about a possible return to Portugal, the club said in a statement.
Fan tokens are a type of cryptocurrency that allow holders to vote
Roma teenager Afena-Gyan plays down apparent racist remark.