Barefoot, with sweat pouring down their naked chests, 50 men slave in the depths of the Central African forest digging for diamonds in a sandy pit half the size of a football pitch.

The Nigerian military says it has rescued 200 girls and 93 women from an area where the Islamist militant group Boko Haram is active.

Nigeria's military retakes north-eastern town of Bama from Islamist military group Boko Haram