Boko Haram militants kill 11 Chad troops: Military source

Suspected militants from Nigeria's Boko Haram group killed 11 soldiers from neighbouring Chad in a overnight attack in a border region, a Chadian military source said.

Seventeen attackers died also in the fight, the source said. Chad is a leading contributor to a 8,700-strong regional force fighting Boko Haram, which has expanded beyond its northeast Nigerian heartland to attack Chad, and other neighbours, Niger and Cameroon.