Nigeria's Boko Haram Islamic insurgents ‘the world’s deadliest’

A new report says Nigeria’s Boko Haram Islamic insurgents have become the world’s deadliest extremist group, edging out the Islamic State group to which it is affiliated.

The Global Terrorism Index says deaths attributed to Boko Haram increased by 317% in 2014 to 6,644 compared to 6,073 blamed on Islamic State.

Boko Haram pledged allegiance to IS in March and calls itself that group’s West Africa Province.