Paris Saint-Germain coach Christophe Galtier and his son have been detained as part of an investigation into racism allegations at one of his former clubs, Nice prosecutor Xavier Bonhomme told The Associated Press.

Galtier and his son, John Valovic-Galtier, were placed in custody for questioning on Friday. Galtier, who is on his way out of PSG but still under contract, denied accusations that he made racist and anti-Muslim comments when he was in charge of French club Nice.