Mathieu Valbuena and Djibril Cisse were teammates with Marseille and France. Four people, including former France international Djibril Cisse, have been taken into custody in France as part of an investigation into an alleged blackmail attempt. AFP news agency, citing an unnamed police source, said the case concerns a suspected attempt to blackmail France international Mathieu Valbuena over an alleged sex tape. According to a police statement quoted in Le Parisien, Cisse, 34, was detained by judiciary police in Versailles outside Paris. The statement read: "Djibril...