New Delhi, July 26 -- The National Investigation Agency (NIA) has chargesheeted a key perpetrator, a resident of Tamil Nadu, in an ISIS radicalisation and conspiracy case, the agency said on Saturday.

The accused, A Alfasith, hailing from Mayiladuthurai in Tamil Nadu, has been chargesheeted under various sections of the Indian Penal Code and sections 13 and 39 of the Unlawful Activities (Prevention) Act before the NIA Special Court in Poonamalle in Tamil Nadu. The chargesheet was filed on Friday.

The NIA said that Alfasith was closely associated with radicalised Islamists and die-hard supporters of ISIS, including Mohemmed Ashik and Sathik Batcha, who were involved in several terror-related cases in Tamil Nadu.

During the investigation...