A new UN report has suggested the most common factor driving people to join extremist groups in sub-Saharan Africa is not religion, but the need for work.

The report by the UN Development Programme was based on interviews with more than 2,000 individuals in Burkina Faso, Cameroon, Chad, Mali, Niger, Nigeria, Somalia and Sudan.

Only 17% of respondents said that religion was the reason for joining radical groups, whereas 40% said poverty was their main motivation.