At least six National Socialist Council of Nagaland (Isak-Muivah) (NSCN-IM) insurgents were killed in an encounter with Assam Rifles and Arunachal Pradesh Police in Khonsa area of Arunachal Pradesh on Saturday. "Six long-range weapons (four AK-47 and two Chinese MQ) have been recovered so far," said Arunachal Pradesh DGP RP Upadhyaya. An Assam Rifles soldier was injured in the encounter.