evidence: France has announced a controversial plan to amend the constitution to restrict citizenship to people born to immigrants in the overseas territory of Mayotte in a move aimed at curbing immigration to the Indian Ocean islands. [...] Mayotte is one of the five overseas departments of France located in the Indian Ocean, off the East African coast comprising of two islands. [...] Residence permits issued to foreigners in Mayotte are only valid for the island and cannot be used to travel to mainland France. The scrapping of that system is one of the key demands of the protesters.