Nigeria is becoming the “biggest killing ground of Christians in the world” due to attacks by Boko Haram and Fulani militants, says a leading charity. International Christian Concern (ICC) estimates between 50,000 and 70,000 Christians have been killed in the last decade in the West African nation, the most populous on the continent. Nigeria’s 206 million people are almost evenly divided between Muslims and Christians. Islam is the dominant faith in the North, and Christianity in the South – but most of the killings take place in Nigeria’s Middle Belt, where the halves of the country meet.