Itanagar Mar 21 PTI Security forces gunned down two NSCNIM insurgents while another was injured in an encounter in Tirap district of Arunachal Pradesh a senior police official said here on Monday One cadre of the outfit was arrested by the security personnel who also recovered a huge cache of arms and ammunition Inspector General of Police Law Order Chukhu Apa said The incident occurred at Old Kolagaon near Khonsa the district headquarters on Sunday An AK-56 rifle with a magazine one 556 mm M4A1 carbine made in the US a 32 mm pistol a huge cache of ammunition and other warlike stores were recovered from the encounter site Apa said The IGP said that Triap district police and Assam Rifles on Saturday jointly launched an operation based on intelligence inputs about the presence of the NSCNIM cadres in the area After they reached the spot a gun battle started between the two sides which continued till Sunday It was later found that two insurgents were killed and one was injured The injured man was taken to a hospital in Dibrugarh town of Assam The NSCNIM insurgents have been carrying out extortion drives and recruiting new cadres in Tirap district since January the police official said PTI UPL NN NN