BBC News with David Austin

President Goodluck Jonathan of Nigeria has challenged the Islamist militant group Boko Haram to identify themselves and clearly state their demands as a basis for dialogue. He said military intervention was not the sole means of ending the conflict.

"The military confrontation is required now because you must reduce it by all means, but military confrontation alone will not eliminate terror attack. Your superior intelligence and providing enabling environment for young people to have jobs."