Federal authorities say they have found no security threat after investigating more than 5,000 reported drone sightings across Connecticut and neighboring states.

A drone manufacturer based in Stratford also believes the sightings are not suspicious, but state and congressional leaders are demanding more answers.

The Pentagon, the FBI, Department of Homeland Security and the Federal Aviation Administration issued a rare joint statement on Tuesday, pushing back on fears that the drone sightings are a threat.

“Having closely examined the technical data and tips from concerned citizens, we assess that the sightings to date include a combination of lawful commercial drones, hobbyist drones and law enforcement drones, as well as manned fixed-wing aircraft, helicopters, and stars mistakenly reported as drones,” the statement said.

National security adviser John Kirby told Fox News that federal officials have investigated more than 5,000 reported sightings along with state and local law enforcement.

“We’ve done the detection, then the analysis. We’ve corroborated the sightings,” he said. “And in every case that we have examined to date, we have seen nothing, nothing that indicates a public safety risk.”

Inside a hangar at Sikorsky Airport in Stratford, Wave Aerospace produces cutting-edge drones for commercial clients.

CEO Mark Strauss, a veteran aerospace engineer, doesn’t think the public should be concerned.

“We don't know what they're doing, but they don't appear to be doing anything aggressive,” he said. “Whoever is doing this is, for the most part, being very careful to adhere to what the FAA has outlined as the rules of the road basically.”

Strauss said drones are usually easy to track with a Remote ID module. Anyone can view the data on an app.

“Here is the information about this drone,” he showed News 12 Connecticut. “It’s giving us signal strength, when it was first seen, last seen.”

But in many cases, drones spotted across the Northeast aren’t transmitting anything – and sometimes kill their lights when approached by police helicopters. Strauss said the FAA’s lack of alarm could indicate the drones have permission to fly without a transponder.

“The one thing we're curious about is – one, whether they are receiving that – or two, whether permission has been given by someone not to carry a device like this,” Strauss said.

Whether these drones are something harmless or something else, Connecticut state and congressional leaders are demanding more detailed answers from the federal government.

“That seems to be where we are right now – the reassurance that it’s safe, that it’s benign. But not real facts as to who and what these drones are,” state Sen. Tony Hwang (R-Fairfield) said on Monday. “Without facts, we lead to speculation. And speculation leads to uncertainty and potentially fear.”

Gov. Ned Lamont believes most sightings are “explainable,” but agreed that Washington needs to be more forthcoming.

“I’ve got to get to the bottom of this,” he said Monday. “I’ve got to make sure that we don’t have any security risk. I’ve got to make sure none of our airports are at risk.”

At Bradley Airport last Thursday, a JetBlue reported a suspected drone in audio recorded by LiveATC.net.

Connecticut’s congressional delegation also appears to be in the dark – including Sen. Richard Blumenthal, who sits on the Senate Intelligence Committee.

“I am deeply frustrated – in fact, angry – that the federal government has failed to do more," he said Monday. “The Homeland Security Department needs to deploy the drone-specific radar that is designed to detect these kinds of unmanned aerial vehicles. Whether they’re drones or something else, we need to know more, and the government needs to tell us more.”

If you see something that looks out of place in the sky, report it to the Connecticut Suspicious Activity Reporting Portal