Ariko abakurikiranira hafi ibibera muri Nigeria baravuga ko ibi bishobora kuba bifite aho bihuriye n'ibitero biheruka bya Boko Haram mu majyaruguru y'uburasirazuba bw'igihugu - harimo n'icyahitanye abantu byibura 50 mu musigiti wo mujyi wa Mubi mu ntara ya Adamawa.
