What are the flying objects spotted in New Jersey?

Residents in several counties of the state have reported sighting drones, sometimes over military facilities

Since about mid-November, hundreds of New Jersey residents have been calling law enforcement and state officials after spotting what appeared to be drones in the skies over about a dozen counties. The reports have become more frequent in recent days. In some sightings, mysterious car-sized flying objects, sometimes in groups, were seen above military installations and critical infrastructure such as energy facilities, railway stations and reservoirs. Republican state senator Jon Bramnick said it amounted to a limited state of emergency".