An Assam Rifles patrol team came under suspected militant fire near Nampong Nallah in Changlang, killing 42-year-old Havildar Jankhokai Kuki and injuring four personnel.
Security forces launched a search operation after the attack, which occurred near an ongoing India-Myanmar border fencing project.
Preliminary reports have suggested possible NSCN-K-YA involvement, but officials have not confirmed the identity of the attackers.

