Nigeria's army has offered 290 million naira ($1.8 million) for information leading to the capture of 19 leading members of Islamist sect Boko Haram, whose insurgency has killed hundreds this year.
Boko Haram wants to impose strict sharia - or Islamic law - in the country of 160 million, split roughly equally between Christians and Muslims, and the group has become the biggest security threat to Africa's largest oil producer. (Reuters)