New Delhi, Oct. 5 -- The National Investigation Agency (NIA) has filed a charge sheet against Abhijot Singh alias Babba, a key accused in the September 2024 grenade attack in Chandigarh, the agency said on Saturday. The federal anti-terror probe agency said Abhijot Singh, arrested in April, has been named as an accused in a charge sheet filed before a special NIA court in Chandigarh on Friday. "The attack, which targeted a retired Punjab Police officer, was part of a conspiracy to spread fear in the society. The entire conspiracy was orchestrated by Pakistan-based BKI terrorist Harwinder Singh alias Rinda, in collusion with US-based gangster Happy Passia," the agency said in a statement. The probe by NIA revealed that Passia, arrested by th...