The leader of the Islamic State militant group that controls tracts of Syria and Iraq has accepted a pledge of allegiance from Nigerian Islamists Boko Haram, his spokesman said, calling on supporters to fight in Africa.
Boko Haram, which has killed thousands and kidnapped hundreds during a six-year campaign to carve out an Islamist state in northern Nigeria, pledged its allegiance last week, highlighting increased coordination between jihadi movements across north Africa and the Middle East.