Manchester United will be questioned by Portuguese police as part of the criminal investigation into the signing of striker Bebe from Vitória Guimarães almost two years ago.
The Premier League giants paid €9 million to secure the services of the 21-year-old, who had only completed one season in the Portuguese third division.
United manager Sir Alex Ferguson said at the time that Bebe was the only player he had ever brought to Old Trafford without ever seeing him play - not even on video.
Bebe was signed after being recommended to Ferguson by his former assistant Carlos Queiroz, who was coach of the Portugal national team at the time.
Bebe's agent Jorge Mendes, who also represents Cristiano Ronaldo, Anderson and Nani, was reportedly appointed only three days before the completion of the deal, and pocketed €3.6 million after its completion.
However, according to The Guardian, the police unit were not prepared to divulge details about what part of the deal they are focusing their investigation on.