Eight sorties of drones in five days in the months of August and September in 2019 dropped arms, ammunition, explosives and fake Indian currency notes into Indian territory from across the border in Pakistan, said the National Investigation Agency (NIA). According to the agency, the aim was to revive terrorism and carry out a huge terror attack.
The NIA has made explosive claims of drones being used by proscribed terrorist organisation Khalistan Zindabad Force, (KZF) in its chargesheet filed in the case. The chargesheet has been filed against nine members of the outfit who have been accused of transporting the consignments into Punjab to execute a huge terrorist incident so that an atmosphere of disharmony, communal tension and instability is created in Punjab and other states.
Source: https://www.theweek.in/news/india/2020/03/18/khalistani-militant-outfit-was-planning-a-huge-terror-attack-in-india-nia.html