The drone crashed following an exercise carried out by IAF ammunition depot officials at around 7.30am, said SHO Sudeep Singh.
Local residents who witnessed the crash informed the police about it, after which an FIR was registered in Palam Vihar police station, he said.
Locals said the drone crashed on a vacant plot near Om Vihar Colony.
According to sources, IAF officials have been carrying out regular ground and aerial exercises in the wake of the Pathankot terror attack and fire in Asia's biggest ammunition depot in Maharashtra.