An investigation into Chelsea’s recruitment of youth players has been launched, FIFA has revealed.

The Premier League champions were subject to sanctions from the world governing body previously concerning Gael Kakuta’s transfer from Lens in 2007, which were subsequently appealed successfuly to the Court of Arbitration for Sport (CAS).

“We can confirm that an investigation is ongoing, however please note that we cannot provide any details concerning the matters under investigation. We have no further comment,” a FIFA statement said.