The National Investigation Agency (NIA) on Friday filed a chargesheet against an accused in 'Gazwa-e-Hind' case here, an official said. The chargesheet was filed against the accused Marghoob Ahmad Danish alias "Tahir Ahmed", a resident of Phulwarisharif, in the NIA special court in the case relating to radicalization of impressionable youth over various social media platforms for carrying out violent terrorist acts, a spokesperson of the federal agency said.