Abubakar Shekau 'preferred to be humiliated in the hereafter to getting humiliated on Earth. He killed himself instantly by detonating an explosive,' rival leader says

Drought, sea-level rise and other environmental factors could destabilize the region, but Israel's defense establishment is not thinking about the new dangers, a new paper warns

Police and military begin joint operations to rescue children; residents say attackers also assaulted army base to prevent them from intervening

Al-Qaeda, Islamic State view pandemic both as threat and as opening to recruit and to strike harder, taking advantage of armies busy fighting a silent enemy

Decades-long insurgency by Islamic extremist group has left tens of thousands dead, displaced millions and wreaked havoc on Nigeria's north