Nigeria: death threat
Boko Haram killed an aid worker and threatened to kill three other hostages, including the Christian schoolgirl Leah Sharibu, in September.
Christian Solidarity Worldwide / World Watch Monitor
Saifura Hussaini Ahmed Khorsa, 25, who worked as a midwife with the International Committee of the Red Cross, had been abducted on 1 March, alongside two other health workers.
