Unidentified masked gunmen shot dead a senior National Socialist Council of Nagaland-isak-Muivah (NSCN-IM) ‘major’ Toishe Yeptho at Unity colony in Dimapur in Dimapur District of Nagaland on August 16, reports Nagaland Post. Toishe Yeptho hails from Yemishe village in Zunheboto District in Nagaland.