The NIA has filed a charge sheet against two persons, including a ‘major’ of Nationalist Socialist Council of Nagaland-Isaak Muivah (NSCN-IM), Luckin Mashangva of Dimapur (Nagaland), and Jaikishan Sharma of Tirap (Arunachal Pradesh), for their alleged involvement in financing terror activities of the Naga insurgent group, reports The Assam Tribune.