Reports of an explosion from people across New England Saturday afternoon sent police agencies and others scrambling to understand what caused a double boom that shook buildings in Massachusetts and Rhode Island.

The American Meteor Society said that the booms heard about 2:30 p.m. were actually caused by a meteor about 3 feet (nearly 1 meter) wide entering the atmosphere around the New Hampshire border with Massachusetts, north of Boston.

Fire program monitor Robert Lunsford said the society received dozens of reports from Delaware to Montreal with people either hearing the double boom, feeling the ground shake or seeing the fireball — which he said looked like a shooting star in the daytime sky.

“It was definitely bigger than a normal fireball, about a yard wide,” he said.

But Lunsford said it’s unlikely the meteor struck the ground.

“We would need more information about the trajectory the speed and other aspects to know for sure if it hit the ground, but if it didn’t burn up, then it would have landed in the ocean,” he said. “Most of them do burn up before they hit the ground.”

People in a handful of states posted on social media about feeling the buildings they were in shaking. Several videos on the X platform captured what sounded like two quick booms, with no fire, smoke or other visual causes.

Several people filed reports with the U.S. Geological Survey, registering the shaking they felt with the National Earthquake Information Center, agency spokesman Steve Sobie confirmed.

The agency opened an event page, based on the number of “Did you feel it?” reports it received on its website. But Sobie said there was no event registered on the agency’s seismographs. meaning the shaking was not due to an earthquake.

High winds and widespread rain contributed to more than 12,000 power outages Saturday as a low pressure system passes over New Hampshire.

A high wind advisory remains in effect for southeastern New Hampshire until midday.

There is a high surf advisory in effect for the Seacoast area until 8 p.m. Saturday, with large-breaking waves in the range of 6-9 feet, according to the National Weather Service.

The forecast warns of dangerous wintry winds for hikers and campers, with heavy wet snow likely at higher elevations and a foot of snow possible on summits in the White Mountains.

In southeastern New Hampshire, the wind advisory calls for steady winds of 15-25 mph, and potential wind gusts up to 50 mph.

Eversource reported over 10,000 outages as of 9:30 a.m. Unitil had about 1,400 outages at that time.

The Mount Washington Observatory has recorded winterlike weather over the past 24 hours. Weather observers there say over half a foot of snow and sleet has fallen at the summit.

Tensions rose at a Newark, New Jersey, immigration detention center on Saturday as a group of pro-ICE protesters faced off with demonstrators who have maintained a presence outside the facility for more than a week in support of detainees who they say are enduring inhumane conditions inside.

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Saturday morning’s protests outside the Delaney Hall facility saw a heavy police presence, including a group of officers with riot shields blocking the entrance. At one point, a group of federal agents, some carrying long guns, and an armored vehicle were stationed outside.

A day earlier, New Jersey’s Democratic Gov. Mikie Sherrill announced that the state would establish a protected peaceful protest zone outside the facility, citing safety concerns following protests in Minneapolis earlier this year where federal agents killed two American citizens.

Sherrill said Saturday that she was “grateful to the vast majority of protesters who have assembled peacefully and raised their voices about Delaney Hall’s conditions.” She reiterated calls to “keep the temperature down” following the arrest of six people outside the facility late Friday night after protesters failed to follow police orders to disperse. The governor said five of the six arrested were from out of state.

“To the people coming from out of state to create chaos and dangerous situations, you should not be here,” she said at a news conference Saturday afternoon. “You are not helping the people detained at Delaney Hall. You’re not helping detainee families, and you’re certainly not keeping New Jersey safe.”

Sherrill’s announcement followed days of tensions outside the Delaney Hall facility over allegations of abysmal conditions and the use of violence against detainees, which the Department of Homeland Security denies. Nine people demonstrating in support of detainees were arrested Thursday following clashes with ICE officers.

Shouting matches between protesters

The atmosphere on Saturday was tense but peaceful. Police set up fencing to establish protest areas and separate the groups. Later, police officers blocking the entrance to the facility were seen without riot gear.

Protesters rallying in support of immigrants inside the facility banged on drums and chanted, “Shut down Delaney Hall, free them all!” and “Shut this racist system down!”

Some held signs saying “ICE OUT NOW,” and a group of healthcare workers held signs reading “Doctor against deportations” and “Health care worker against deportations.”

Many of the demonstrators have said they were protesting what they described as unsafe and inhumane conditions inside Delaney Hall.

Ashley Kussman said she was protesting for the detainees who were being held “in cruel conditions and who are being abused by our government and by a private corporation acting for our government,” referring to DHS and GEO Group, the private company that runs the facility.

“I am very worried for the state of our country,” she told The Associated Press. “I support the Constitution. I support democracy and I support the freedom to speak, the freedom to gather, the freedom to live without having to worry that you’re going to get kidnapped off the street by somebody in a mask and a uniform.”

Separated by fencing, the group of pro-ICE protesters held American flags and chanted, “USA, USA.”

They held signs that read “Make America Great Again” and “Support ICE.”

“We’re here basically to support ICE and the situations and the dealings that they’re unfortunately coming about. They’re just trying to do their jobs,” protester Michael, who declined to give his last name, told the AP.

“These officers are just under crazy scrutiny,” he said. “They just go out every day to risk their lives on the line and make sure that we make it home safe.”

Some protesters shouted across the fencing at each other.

“For days, we’ve heard reports of unsafe, inhumane and unconstitutional conditions there,” Sherrill said at a news conference Friday. “We’ve seen increasing violence, arrest and pepper spray at Delaney Hall, as well as public threats from the Trump administration, and we’ve seen the risk to public safety rising outside of Delaney Hall.”

DHS said on social media Saturday that ICE agents had “been bitten and faced death threats and assaults from violent rioters in New Jersey.” The agency thanked New Jersey law enforcement.

DHS and GEO Group did not respond to NBC News’ requests for comment on Saturday.

Regarding allegations of violence against the detainees inside the facility, GEO Group said in a statement Friday that staff responded to a “physical altercation involving detainees at Delaney Hall” on Thursday and that, in accordance with its policies, staff used “control measures to safely resolve the situation, including the limited use of chemical agents.”

The company added that its response was “carried out in strict adherence to federal standards and comprehensive training,” and that affected detainees were evaluated by on-site medical personnel and “were cleared with no serious injuries.”

GEO Group also said it categorically rejected what it called “baseless accusations” against the facility, which it said were “politically motivated,” adding that its services are monitored by ICE and DHS.

It said its support services include “around-the-clock access to medical care,” dietitian-approved meals, religious and specialty diets and access to medical care, the statement said.

Another night of tension

The protests remained tense on Friday night. As police erected protest barriers, ICE agents who had formed a line in front of protesters moved inside the building’s perimeter fence, according to NBC New York. New Jersey State Police Lt. Col. David Sierotowicz said ICE officers agreed to stand down as state police assumed responsibility.

Demonstrators had mixed reactions to the barriers. Some staged a sit-in and refused to move into one of the new protest areas police established using metal barriers and concrete blocks.

Around 10 p.m. on Friday night, a large team of state police carrying riot shields moved on protesters after reportedly giving those outside the facility a 15-minute warning.

Police began pushing the group of protesters back and deployed pepper spray. Moments after the chaos unfolded, police approached a marked WNBC news vehicle parked near the commotion and ordered the crew to exit the car into the cloud of tear gas.

Sierotowicz said at the news conference alongside the governor on Saturday that authorities spent several hours the previous night directing protesters to move to a designated area.

After some protesters failed to comply, police issued dispersal orders at 15-, 10- and 5-minute intervals, he said.

“During these announcements, agitators surrounded a marked enforcement vehicle car and made threats towards personnel, creating immediate safety concerns due to escalating safety risks,” he said.

Sierotowicz said some protesters “were observed retrieving face coverings, gas masks, fireworks, rocks, and other projectiles” and a public safety response team was deployed to move the crowd away from the area and create “safe passage for personnel with no significant injuries to the public or law enforcement.”

The ACLU of New Jersey said Saturday that the protests at the facility “have been overwhelmingly peaceful demonstrations of people exercising their constitutional right to call out the inhumanity of the immigration detention and deportation system.”

“New Jersey’s response must prioritize the safety and well-being of people — not mimic the dangerous and overly militarized tactics of the federal government,” John Butler, the political director of the ACLU of New Jersey, said in a statement. “The New Jersey State Police’s actions against protesters at Delaney Hall were an unnecessary response to free speech and the right to peaceful protest.”

“The real harm we’re facing isn’t from peaceful protests, but from the rampant ICE raids tearing apart our communities, the brutality of the immigration detention system, and the retaliation and excessive force being used against detainees, observers, journalists, and protesters,” he said.