Ukraine’s southern city of Mariupol, now fully under Russian control, is at risk of a cholera outbreak, according to a British intelligence report published Friday, echoing concerns of Ukrainian officials as Russia struggles to provide basic public services to civilian populations in areas it has occupied.Ukraine’s southern city of Mariupol, now fully under Russian control, is at risk of a cholera outbreak, according to a British intelligence report published Friday, echoing concerns of Ukrainian officials as Russia struggles to provide basic public services to civilian populations in areas it has occupied.