The National Investigation Agency (NIA) has arrested one person in connection with the ambush on the ROP of the 4th Assam Rifles, reports One India on August 21. The person arrested is Thangjam Achou, a ‘Lieutenant’ of PLA. The NIA has been probing the case relating to an ambush on a Road Opening Party of the 4th Assam Rifles at Manipur that took place on November 15, 2017. The NIA has also arrested Yangte Josaham, a resident of Arunachal Pradesh and a ‘Lieutenant ‘of the NSCN-IM. He was involved in the killing of an MLA and ten others on May 21, 2019.