 Ariko abakurikiranira hafi ibibera muri Nigeria baravuga ko ibi bishobora kuba bifite aho bihuriye nibitero biheruka bya Boko Haram mu majyaruguru yuburasirazuba bwigihugu - harimo nicyahitanye abantu byibura 50 mu musigiti wo mujyi wa Mubi mu ntara ya Adamawa. 