A suspected Chinese spy balloon that was shot down by the US over the weekend was 60m (200ft) tall – comparable to a 20-storey building.
Glen VanHerck, commander of North American Aerospace Defence Command (NORAD), told reporters that the balloon was also carrying a load similar in size to a commercial plane.
He added that it most likely weighed in the region of 71st (1,000lbs).
The balloon was shot down with a missile fired by an F-22 fighter aircraft, about six nautical miles off the coast near Myrtle Beach, South Carolina, Pentagon officials said on Sunday.
Television footage showed a small explosion, followed by the balloon descending toward the water.
The height of the balloon, twice the size of the Rockefeller Center Christmas tree – as well as the load – were factors in the “decision-making process” to wait and shoot the object down until it was over the Atlantic Ocean, NBC reported.
Pentagon officials said they feared debris could cause civilian injuries, death or damage to properties. Another concern was that the balloon may have been carrying explosives, Mr VanHerck added.
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2:33
How the US shot down the balloon
Security zone implemented in South Carolina waters
On Monday, the US coast guard imposed a temporary “security zone” in waters off the South Carolina coast, as a result of the military’s search and recovery of debris.
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Officials hope to gain valuable intelligence on the balloon’s operations by retrieving as many components as possible, a White House spokesperson said.
In a statement on Sunday, the Chinese foreign ministry called the shooting an “obvious overreaction” that “seriously violated international conventions”.
It country warned of “serious repercussions” while the White House said the balloon’s flight over the US had done nothing to improve already tense relations with China.
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3:20
How US shot down China’s ‘spy balloon’
China apologises for balloon over Costa Rica
During a statement, Chinese foreign ministry spokesperson Mao Ning said another balloon had been spotted over Latin America after “severely deviating” and becoming affected by weather.
According to a brief statement from Costa Rica’s foreign ministry, the Chinese embassy in San Jose “apologised for the incident”, while insisting the balloon was focused on scientific research.
At the time planes were notified but no further action was taken, according to the civil aviation director.
Police sources have told NBC News the identity of a man detained as a “person of interest” after a fatal shooting on the campus of Brown University in Providence, Rhode Island.
Three senior law enforcement officials, briefed on the investigation, told Sky News’s US partner that the suspect is 24-year-old Benjamin Erickson, who had served several years in the US army.
Two people were killed and nine others, all or nearly all of whom are also believed to be students, were injured in the attack at around 4pm (9pm UK time) on Saturday.
Sources told NBC that authorities are looking into what might be an extensive mental health history for Mr Erickson. Any connection with Brown University is also being investigated.
FBI Director Kash Patel posted details of an arrest at a Hampton Inn hotel in Coventry, about 20 miles (32km) from Providence, early on Sunday, “based off a lead” from Providence police.
Image: An operation to arrest a ‘person of interest’ at a hotel in Coventry, Rhode Island. Pic: @FBIDirectorKash/X
Image: Police taping off hotel rooms following the arrest. Pic: AP
According to a statement provided to NBC News from army spokesperson, Lieutenant Colonel Ruth Castro: “Benjamin W Erickson was an Infantryman (11B) in the Regular Army from May 2021 to November 2024. He has no deployments and left the Army in the rank of specialist.”
Public records show he was living in Washington DC in 2024 and had also been resident in Wisconsin in 2020.
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Providence police chief Colonel Oscar Perez told reporters on Sunday that the investigation is “complex” and progressing “extremely fast”, but refused to elaborate.
The shooting happened inside a classroom on the first floor of the Barus & Holley engineering building, a seven-storey structure home to much of the university’s engineering and physics study and research.
Image: Part of the Brown University campus, the right side of the C-shaped block is the engineering building. Pic: Reuters
Brown University provost Frank Doyle confirmed that final exams were taking place in the engineering building when the gunman opened fire.
A police official told the AP news agency that the gunman fired more than 40 9mm rounds. A gun has not been recovered, but officers did seize two loaded 30-round magazines.
A video released by officials shows a suspect walking down a street away from the campus and turning a corner, dressed in dark, loose-fitting clothing.
Image: Pic: AP
Image: Pic: AP
Of those injured, eight people have been described as stable, although one remains critically ill. Another person has left hospital.
Providence mayor Brett Smiley said the order to shelter-in-place for nearby neighbourhoods had been lifted, but some streets remained shut as investigators work at the scene.
“The people of Providence should breathe a little easier this morning,” Mr Smiley added.
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1:17
‘Stay inside’ mayor warns after shooting
Access to parts of the campus remained restricted on Sunday as police maintained a security perimeter around Minden Hall and nearby apartment buildings.
The site has hundreds of buildings, including lecture halls, laboratories and dorms.
Brown is a private university with roughly 7,300 undergraduate students and more than 3,000 graduate students.
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Student Chiang-Heng Chien said he was working in one of the labs with three other students when they received a notification about a shooting nearby.
“We decided to turn the light off and close all the doors and hide under our desks, and wait for the next notification after the shooting,” he told reporters.
The students hid under the desks for about two hours.
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2:23
‘We hid under our desks for two hours’
“I was hoping that no one’s getting hurt and no one’s dead,” he said.
The students left the building when they received another notification, and security personnel moved in to search the facility.
Emma Ferraro, a chemical engineering student, was in the Barus & Holley lobby working on a final project when she heard loud popping sounds coming from the eastern side of the building.
For a moment, everyone paused and looked around, she recalled.
Once Ferraro realised the sounds were gunshots, she rushed to the door and ran to a nearby building, where she had been sheltering for the past few hours.
Image: Pic: AP
Image: Pic: AP
One person who was initially thought to be involved in the shooting was detained but was later determined to have no involvement.
President Donald Trump told reporters at the White House that he had been briefed on the situation, which he called “terrible”.
“All we can do right now is pray for the victims and for those that were very badly hurt,” he added.
A “person of interest” has been detained after a gunman opened fire on the campus of Brown University in Providence, Rhode Island, killing two students.
Nine people, all or nearly all of whom are also believed to be students, were injured in the attack at around 4pm (9pm UK time) on Saturday.
Eight people have been described as stable, although one remains critically ill. Another person has left hospital.
A video released by officials shows a suspect walking down a street away from the campus and turning a corner, dressed in dark, loose-fitting clothing.
An FBI agent confirmed the arrest took place at a Hampton Inn hotel in Coventry, about 20 miles (32km) from Providence early on Sunday.
Authorities said the suspect was in their 20s, younger than was initially reported, but no further details have been released about them.
Image: Pic: AP
Image: Pic: AP
Providence Police Deputy Chief Tim O’Hara said the shooting happened inside a classroom on the first floor of the Barus & Holley engineering building, a seven-storey structure home to much of the university’s engineering and physics study and research.
More on Brown University Shooting
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Brown University provost Frank Doyle confirmed that final exams were taking place in the engineering building Saturday afternoon when the gunman opened fire.
A police official told the AP news agency that the gunman fired more than 40 9mm rounds. A gun has not been recovered but officers did seize two loaded 30-round magazines.
On Sunday, Providence mayor Brett Smiley told reporters the order to shelter-in-place for nearby neighbourhoods had been lifted, but some streets remained shut as investigators work at the scene.
“The people of Providence should breathe a little easier this morning,” Mr Smiley added.
Please use Chrome browser for a more accessible video player
1:17
‘Stay inside’ mayor warns after shooting
Access to parts of the campus remained restricted on Sunday as police maintained a security perimeter around Minden Hall and nearby apartment buildings.
The site has hundreds of buildings, including lecture halls, laboratories and dorms.
Brown is a private university with roughly 7,300 undergraduate students and more than 3,000 graduate students.
Datawrapper
This content is provided by Datawrapper, which may be using cookies and other technologies.
To show you this content, we need your permission to use cookies.
You can use the buttons below to amend your preferences to enable Datawrapper cookies or to allow those cookies just once.
You can change your settings at any time via the Privacy Options.
Unfortunately we have been unable to verify if you have consented to Datawrapper cookies.
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Student Chiang-Heng Chien said he was working in one of the labs with three other students when they received a notification about a shooting nearby.
“We decided to turn the light off and close all the doors and hide under our desks, and wait for the next notification after the shooting,” he told reporters.
The students hid under the desks for about two hours.
Please use Chrome browser for a more accessible video player
2:23
‘We hid under our desks for two hours’
“I was hoping that no one’s getting hurt and no one’s dead,” he said.
The students left the building when they received another notification, and security personnel moved in to search the facility.
Emma Ferraro, a chemical engineering student, was in the Barus & Holley lobby working on a final project when she heard loud popping sounds coming from the eastern side of the building.
For a moment, everyone paused and looked around, she recalled.
Once Ferraro realised the sounds were gunshots, she rushed to the door and ran to a nearby building, where she had been sheltering for the past few hours.
Image: Pic: AP
Image: Pic: AP
One person who was initially thought to be involved in the shooting was detained but was later determined to have no involvement.
President Donald Trump told reporters at the White House that he had been briefed on the situation, which he called “terrible”.
“All we can do right now is pray for the victims and for those that were very badly hurt,” he added.