1: ( CNN ) In an audio message purportedly from an ISIS spokesman , the group announced that a pledge of allegiance from Nigerian-based Boko Haram has been accepted by ISIS leader Abu Bakr al-Baghdadi . 2: The message says that the caliphate , or Islamic State , has expanded to western Africa and congratulated  our jihadi brothers  there . 3: Abu Bakr al-Baghdadi 's spokesman congratulated  our jihadi brothers  in western Africa .
1: Nigerian-based Boko Haram 2: our jihadi brothers 3: our jihadi brothers '' in western Africa