The drones were reported flying in several areas along the Raritan River.
"Law enforcement has been notified for the last week or so about people seeing drones mostly at night," said Washington Township Mayor Matt Murello.
The nightly drone sightings involved larger-than-hobbyist type drones and raised questions because of their proximity to both the Picatinny Arsenal and President-elect Trump's Bedminster golf course.
A video obtained by Eyewitness News from Bridgewater native Stephanie Marie shows other drones flying without noise, and described about six feet across the sky with lights.
"We've been getting complaints as well in this area. We do see recreational drones, sometimes flown, but these don't appear to be that," added Murello.
The aircraft sightings have sparked wild theories that have spread online.
"Some people think that it's really advanced people trying to steal packages off people's porches for the holidays," said Denville resident Kate Perry. "But these drones, they do not look like something you can just buy at a store."
Multiple law enforcement agencies in New Jersey released a joint statement:
"County and local law enforcement agencies are aware of the recurring reports of drone activity around Morris and Somerset counties, and acknowledge the public's concern about these repeated sightings."
Local police and officials have said there is no known threat to public safety.
But that's of little comfort to people who live in the impacted counties and are creeped out.
"I don't feel too safe right now with these flying overhead every single night, and the fact that it's not just one or two of them, it's at least ten of them every single night, for a few weeks now," Perry said.
The FAA is keeping an eye on these drone sightings and shutting down the airspace temporarily. There's a $75,000 fine for unauthorized drone use that endangers aircraft or people on the ground.
Anyone with information about the drones is encouraged to call the FBI at 1-800-CALL-FBI (1-800-225-5324) or submit it online at tips.fbi.gov.
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