TRENTON, N.J. — A large number of mysterious drones have been reported flying over parts of New Jersey and have been spotted in recent days across the eastern U.S., sparking speculation and concern over where they are coming from and why.

New Jersey Gov. Phil Murphy and U.S. Sen. Andy Kim have both gone out on drone hunts, hoping for answers.

Murphy posted on X on Sunday night that he went out with state police officials in West Trenton, N.J., surveying the area for drones. “The public deserves clear answers — we will keep pushing the federal government for more information and resources,” he said.

Murphy and law enforcement officials have stressed that the drones don’t appear to be a threat to public safety, but many state and municipal lawmakers have nonetheless called for stricter rules about who can fly the unmanned aircraft.

The FBI is among several agencies investigating and has asked residents to share videos, photos and other information they may have about the drones.

Dozens of witnesses have reported seeing them in the state since mid-November.

At first they were spotted flying along the scenic Raritan River, which feeds the Round Valley Reservoir, the state's largest aquifer, about 50 miles west of New York City.

But soon sightings were reported statewide, including near the Picatinny Arsenal, a military research and manufacturing facility, and over President-elect Donald Trump’s golf course in Bedminster.

Republican U.S. Rep. Chris Smith said a Coast Guard commanding officer told him a dozen drones closely followed a Guard lifeboat earlier this month.

The growing anxiety among some residents is not lost on the Biden administration, which has faced criticism from Trump for not dealing with the matter more aggressively.

In a call with reporters Saturday that was organized by the White House, senior officials from the FBI, Pentagon, Federal Aviation Administration and other agencies sought to assure people that the drones are not a national security or public safety threat, or the handiwork of a malicious foreign actor.

The White House has said a review of the reported sightings shows that many of them are actually manned aircraft being flown lawfully, echoing the opinion of officials and drone experts.

The federal Homeland Security Department and FBI also said in a joint statement they have no evidence that the sightings pose “a national security or public safety threat or have a foreign nexus.”

Authorities say they do not know.

The FBI, Homeland Security and state police are investigating the sightings. Authorities say they don’t know if it is one drone that has been spotted many times or if there are multiple aircraft being flown in a coordinated effort.

Speculation has raged online, with some expressing concerns that the drone or drones could be part of a nefarious plot by foreign agents.

Officials stress that ongoing state and federal investigations have found no evidence to support those concerns, but Rep. Smith on Saturday echoed such speculation.

“The elusive maneuvering of these drones suggests a major military power sophistication that begs the question whether they have been deployed to test our defense capabilities — or worse — by violent dictatorships, perhaps maybe Russia, or China, or Iran, or North Korea,” he said.

Pentagon spokeswoman Sabrina Singh said Wednesday that the aircraft are not U.S. military drones.

In Boston, city police arrested two men accused of operating a drone “dangerously close” to Logan Airport on Saturday night.

Authorities said an officer using drone monitoring technology detected the aircraft and the location of the operators. A third man fled police and remains at large.

Authorities said the two men face trespassing charges and could face more charges and fines.

Drones flying around Wright-Patterson Air Force Base near Dayton, Ohio, forced base officials to close its airspace for about four hours late Friday into early Saturday, said Robert Purtiman, a base spokesperson.

It was the first time drones had been spotted at the base, one of the largest in the world, and no sightings have been reported since early Saturday, Purtiman said Monday.

He would not say how many drones were flying in the area, adding that they ranged in size and that they did not impact any facilities on the base.

Trump has said he believes the government knows more than it’s saying. “Let the public know, and now. Otherwise, shoot them down!!!” he posted on his social media site.

Democratic Sen. Richard Blumenthal of Connecticut said Thursday that the drones should be “shot down, if necessary.”

A New Jersey congressman has urged the Pentagon to authorize the use of force to bring down one or more drones to try to figure out who deployed them.

The objects could be downed over the ocean or in an unpopulated area on land, Smith said Saturday at a news conference.

“Why can't we bag at least one of these drones and get to the bottom of it?” Smith said.

Monmouth County Sheriff Shaun Golden said people should not take it into their own hands to shoot down drones, as that would violate state and federal laws.

Drone sightings have now been reported in New York, where a permit is required, and Mayor Eric Adams said the city was investigating and collaborating with New Jersey and federal officials.

The runways at Stewart International Airport — about 60 miles north of the city — were shut down for about one hour Friday night because of drone activity in the airspace, Gov. Kathy Hochul said.

“This has gone too far,” she said in a statement.

The governor called on Congress to strengthen the FAA’s oversight of drones and give more investigative authority to state and local law enforcement.

Two people said they spotted an aircraft Thursday night near Virginia Beach that was unlike any other they’ve seen.

The object was over the ocean, and they watched as it slowly moved over an Army National Guard facility, John Knight told the Virginian-Pilot. “It flew like a helicopter but made no noise,” he said.

The Virginia National Guard said it was aware of the incident and it was under investigation.

Another military installation in the area is Naval Air Station Oceana Dam Neck Annex. NAS Oceana, the East Coast master jet base in Virginia Beach, is aware of recent reports of sightings in the area and is coordinating with federal and state agencies to ensure the safety of its personnel and operations, Katie Hewett, public affairs officer, said Friday by email.

In Massachusetts, 10 to 15 drones were reported hovering over a home Thursday night in Harwich on Cape Cod. A resident told police they were bright, and she observed them for more than an hour.

Earlier that evening, an off-duty police officer in the same town noticed similar activity near a public safety complex, police said. The information was forwarded to the FBI and Massachusetts State Police.