NEW DELHI: The National Investigation Agency (NIA) on Thursday filed a chargesheet against Khalistani terrorist Hardeep Singh Nijjar, a resident of Canada, for his involvement in terrorist activities in India. He was chargesheeted under sections 120-B, 153-B of the Indian Penal Code and 13,17,18,20,38 and 40 of the Unlawful Activities (Prevention) Act before the NIA Special Court in New Delhi.