Qatar’s Nasser al-Khelaifi, president of the Paris St Germain soccer club, is under formal investigation for alleged corruption, a French judicial source said.

Al-Khelaifi and a close associate were questioned by French investigators in March in relation to the bidding process for the 2017 athletics world championships, a second source said.

The soccer club, which won this year’s top-flight league in France, did not immediately respond to a request for comment.