On 5 October 1961, the Prefecture of Police announced in a press statement the introduction of a curfew from 8.30 p.m. to 5.30 a.m. in Paris and its suburbs for "Algerian Muslim workers", "French Muslims" and "French Muslims of Algeria" (all three terms used by Papon, although the approximately 150,000 Algerians living at the time in Paris were officially considered French and possessed a French identity card). The French Federation of the FLN thus called upon the whole of the Algerian population in Paris, men, women and children, to demonstrate against the curfew, widely regarded as a racist administrative measure, on 17 October 1961. According to historian Jean-Luc Einaudi, Papon had 7,000 policemen, 1,400 CRS and "gendarmes mobiles" (riot police) to block this demonstration, to which the Prefecture of Police had not given its agreement (mandatory for legal demonstrations). The police forces thus blocked all access to the capital, metro stations, train stations, Paris' "Portes", etc. Of a population of about 150,000 Algerians living in Paris, 30,000–40,000 of them managed to join the demonstration however. Police raids were carried out all over the city. 11,000 persons were arrested, and transported by RATP bus to the Parc des Expositions and other internment centers used under Vichy. Those detained included not only Algerians, but also Moroccan and Tunisian immigrants, who were then sent to the various police stations, to the courtyard of the police prefecture, the Palais des Sports of Porte de Versailles (15th Arrondissement), and the Stade Pierre de Coubertin, etc.