The National Investigation Agency (NIA) has arrested a top NSCN (IM) leader for murder of Arunachal Pradesh’s West Khonsa MLA Tirong Aboh and 10 others.
NIA officials said the accused identified as Ellie Ketok was arrested from Dimapur in Nagaland in a joint operation with local Military Intelligence (MI) unit.
Ketok is a self-styled sergeant major of proscribed NSCN (IM) and area commander of Tirap area.
He was part of killing team and had fired upon Tirong Aboh and others on May 21, 2019, said an official.
The NIA began investigation into the incident in June after state government transferred the case to the central investigative agency.
Five accused — Sethok Kangnong, Napong Jenpi, Jai Kishan Sharma, Luckin Mashangva and Yangte Josaham — were arrested earlier in connection with the incident.
The sitting National People’s Party (NPP) leader Tirong Aboh, who was seeking a re-election from the West Khonsa Assembly seat, was killed when he was on his way to his constituency from Dibrugarh.
The militants opened fire at his vehicle near Bogapani village in Tirap district around 11.30 a.m.