On Monday, the cadre decamped with one G3 rifle with 250 live rounds, one MQ rifle with 150 live rounds, one Mark-III rifle with 100 live rounds, one 410 Musket rifle with 125 live rounds, one .22 pistol with 25 live rounds and one live hand grenade and the money, the police said.
The accused had allegedly fled after looting the money and the arms from the Lakpong Designated Camp but were caught at Sechu (Zubza) in Kohima district.
The arrested persons have been identified as self-styled 'Captain' Nukshi Chang, 'Sgt Major' Y Nayang and '2nd Lieutenant' Ngaku Chang, all three of NSCN (R) and Chang Region Chairman of NSCN (U) Nasuyangbou Chang.
A case has been registered and further investigation is in progress to recover the stolen arms, the police said.