The drones have been appearing frequently over the nighttime sky at Morris County late at night, with locals speculating on social media that it could be anything from surveillance to UFOs. Residents are growing concerned about their origin and so is the FBI, according to a report from the Morristown Daily Record.

Large drones have been hovering in formation over northern New Jersey, officials said Monday, leading to "unnerved" residents wondering what's behind these bright, unidentified flying objects appearing almost every night in the sky.