The large mysterious drones reported flying over parts of New Jersey in recent weeks appear to evade detection through traditional methods such as helicopters and radio, according to a state lawmaker briefed by the Department of Homeland Security on Wednesday.

In a post on the social media platform, the Morris County Republican was among several state and local lawmakers who met with State Police and Homeland Security officials to discuss the spate of sightings coming from the New York City area across New Jersey and west to parts of Pennsylvania, including Philadelphia.

The devices do not appear to be flown by hobbyists, Fantasia wrote.

Dozens of mysterious night flights began last month, sparking growing concern among residents and officials. Part of the concern stems from the flying objects initially spotted near the Picatinny Arsenal, a U.S. military research and production facility. and about Donald Trump’s golf course in Bedminster. Drones are legal in New Jersey for recreational and commercial use, but are subject to local regulations and Federal Aviation Administration (FAA) flight restrictions. Operators must be certified by the FAA.

Most, but not all, of the drones spotted in New Jersey were larger than those typically used by hobbyists.

The number of sightings has increased in recent days, although officials say many of the objects seen may have been aircraft rather than drones. It is also possible that a single drone was reported multiple times.

Gov. Phil Murphy and law enforcement officials have stressed that the drones do not appear to pose a threat to public safety. The FBI has begun an investigation and asked residents to share any videos, photos and other information they may have.

Two Republican congressmen from the Jersey Shore area, Chris Smith and Jeff Van Drew, have called on the military to shoot down the drones.

Smith said a Coast Guard commanding officer informed him of an incident over the weekend in which a dozen drones followed a Coast Guard motorized rescue boat “in close quarters” near Barnegat Light and Island Beach State Park in Ocean County.

Lt Luke Pinneo of the U.S. Coast Guard told the Associated Press on Wednesday that “several low-flying aircraft were observed near one of our vessels near Island Beach State Park.”

The planes were not perceived as an immediate threat and did not disrupt operations, Pinneo said. The Coast Guard is assisting the FBI and state authorities in the investigation.

In a letter to Defense Secretary Lloyd Austin, Smith called for military assistance in dealing with the drones, noting that Joint Base McGuire-Dix-Lakehurst had the ability to “identify and shut down unauthorized unmanned aerial systems.”

However, a Pentagon spokeswoman, Sabrina Singh, told reporters on Wednesday that “our initial assessment here is that these do not involve drones or activity emanating from a foreign entity or adversary.”

Many local lawmakers have called for greater restrictions on who can fly the unmanned devices. At least one state lawmaker has proposed a temporary ban on drone flights in the state.

“This is something we take absolutely seriously. I don’t blame people for being frustrated,” Murphy said earlier this week. A spokesman for the Democratic governor said he did not attend Wednesday’s meeting.

Republican Rep. Erik Peterson, whose district includes parts of the state where drones have been reported, said he also attended Wednesday’s meeting at a state police facility in West Trenton. The meeting lasted approximately 90 minutes.

Peterson said DHS officials were generous with their time but appeared to dismiss some concerns because not all reported sightings were confirmed to be drones.

So who or what is behind the flying objects? Where are you from? What are you doing? “It’s my understanding that (the officers) have no idea,” Peterson said.

A message seeking comment was left with the Department of Homeland Security.

Most of the drones have been spotted in coastal areas and some recently reportedly flew over a large reservoir in Clinton. Sightings have also been reported in neighboring states.

James Edwards of Succasunna, New Jersey, said he has seen some drones flying over his neighborhood since last month.

“It’s particularly concerning because there’s so much unknown,” Edwards said Wednesday. “There are a lot of people talking about various conspiracies that they believe are at play here, but that just adds unnecessary fuel to the fire.” We need to wait and see what’s really happening here and not get distracted by it Letting fear of the unknown overwhelm you.”