CNN reports that on Tuesday, France's highest administrative court, the Council of State, held that the city of Grenoble cannot permit Muslim women to wear the full-length "burkini" bathing suit in its municipal swimming pools. The court said that doing so would compromise principles of religious neutrality and "the equal treatment of users." The court went on to say that the city's initial decision to permit burkinis did so to satisfy religious demands. A French anti-separatism law passed last year prohibits actions whose "manifest objective is to give in to sectarian demands with religious aims."
UPDATE: Here is the full text of the Council of State's opinion in the case.