The unidentified objects shot down over Alaska and Canada in recent days do not resemble the Chinese “spy” balloon downed near South Carolina a week ago, the White House has said.
A spokesperson for its National Security Council said they were “much smaller” but added: “We will not definitively characterise them until we can recover the debris, which we are working on.”
Meanwhile, Canadian Prime Minister Justin Trudeau said recovery teams were searching for the object shot down over his country’s territory to work out what its purpose was.
A US F-22 stealth fighter jet brought it down on Mr Trudeau’s orders on Saturday in the second incident of its type in as many days.
The latest shootdown had occurred over the mountainous and sparsely-populated territory of Yukon in the northwest.
“Recovery teams are on the ground, looking to find and analyse the object,” Mr Trudeau told reporters as he headed for the region for a previously scheduled fundraising event.
“There’s still much to know about it. That’s why the analysis of this object is going to be very important.”
Earlier, Canada’s defence minister Anita Anand would not speculate on where the object came from.
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She described it as cylindrical in shape but said it was smaller than the Chinese balloon shot down off the coast of South Carolina in the US a week ago.
It was flying at 40,000ft and posed a risk to civilian air traffic when it was brought down about 100 miles from the border at 3.41pm EST (8.41pm GMT), she added.
In the US, the Pentagon said that the North American Aerospace Defense Command (NORAD) had spotted the object over the coast of Alaska late on Friday evening.
The US fighter jets were scrambled from the state’s Joint Base Elmendorf-Richardson and were joined by Canadian CF-18 and CP-140 aircraft after the object crossed into Canada.
Pentagon spokesman Brigadier General Patrick Ryder said that the US F-22 had shot down the object using an AIM 9X missile “following close coordination between US and Canadian authorities”.
Mr Trudeau said that the military will recover and analyse the wreckage, adding that he has spoken to US President Joe Biden and thanked NORAD for “keeping the watch over North America”.
The White House said Mr Biden and Mr Trudeau would continue close coordination to “defend our airspace”, adding in a statement: “The leaders discussed the importance of recovering the object in order to determine more details on its purpose or origin.”
The incident happened the day after the US shot down an unknown object flying in its airspace off the coastline of Alaska on the orders of Mr Biden.
It was flying at an altitude of about 40,000ft and was the size of a small car, the White House said.
In an update on Saturday evening, NORAD said it had “no further details at this time about the object, including its capabilities, purpose, or origin”.
It added that “arctic weather conditions” including wind chill, snow, and limited daylight were a “factor” in the recovery operation.
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2:33
Moment ‘spy balloon’ is shot down on 6 February
Image: Photos of the operation to collect the Chinese balloon’s debris were released by the US navy
That object was spotted just days after the US downed a Chinese balloon believed to be a spy aircraft.
China maintainedthe balloon was an airship for scientific research that had accidentally flown over the US.
It was shot down by fighter jetsoff the coast of South Carolina – with the US military starting to collect the debris shortly after.
The Pentagon said much of the balloon has been recovered or located.
The incident sparked a diplomatic row between China and the US, with secretary of state Antony Blinken postponing a visit to Chinathat had been due to start just a few days later.
Mr Biden was diagnosed on Friday, with tests revealing the cancer had spread to his bones.
The former president posted an image of himself and his wife Jill on X on Monday and wrote: “Cancer touches us all. Like so many of you, Jill and I have learned that we are strongest in the broken places. Thank you for lifting us up with love and support.”
Image: The King and Joe Biden at Windsor Castle in July 2023. Pic: Reuters
The King’s letter comes after British Prime Minister Sir Keir Starmer said he was “very sorry to hear President Biden has prostate cancer”.
“All the very best to Joe, his wife Jill and their family, and wishing the President swift and successful treatment,” he added.
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Meanwhile US President Donald Trump said he was “saddened” by the news, adding: “We extend our warmest and best wishes to Jill and the family, and we wish Joe a fast and successful recovery.”
Former US president Barack Obama said: “Michelle and I are thinking of the entire Biden family.
“Nobody has done more to find breakthrough treatments for cancer in all its forms than Joe, and I am certain he will fight this challenge with his trademark resolve and grace. We pray for a fast and full recovery.”
Image: Barack Obama (right) with Joe Biden at a campaign event in 2022. File pic: Reuters
After a poor debate performance against Mr Trump and amid escalating concerns around his age and fitness to serve, Mr Biden withdrew from the 2024 presidential election race and endorsed his vice president Kamala Harris.
Ms Harris wrote on X after his diagnosis: “We are keeping him, Dr. Biden, and their entire family in our hearts and prayers during this time.
“Joe is a fighter – and I know he will face this challenge with the same strength, resilience, and optimism that have always defined his life and leadership. We are hopeful for a full and speedy recovery.”
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1:16
Mr Biden’s diagnosis: What we know
Former US president Bill Clinton wrote on social media: “My friend Joe Biden’s always been a fighter. Hillary and I are rooting for him and are keeping him, Jill, and the entire family in our thoughts.”
Hillary Clinton, who unsuccessfully ran for president in 2016, said she was “thinking of the Bidens as they take on cancer, a disease they’ve done so much to try to spare other families from”.
Speaker of the US House of Representatives Mike Johnson said it was “sad news” and his family “will be joining the countless others who are praying” for Mr Biden.
Former House speaker Nancy Pelosi described Mr Biden as a “great American patriot” and said she was “praying for him to have strength and a swift recovery”.
Mr Trump’s secretary of state, Marco Rubio, wrote on social media that he and his wife were “united in prayer for the Biden Family during this difficult time”.
US President Donald Trump said he was “saddened” by the news, adding: “We extend our warmest and best wishes to Jill and the family, and we wish Joe a fast and successful recovery.”
Former US president Barack Obama said: “Michelle and I are thinking of the entire Biden family.
“Nobody has done more to find breakthrough treatments for cancer in all its forms than Joe, and I am certain he will fight this challenge with his trademark resolve and grace. We pray for a fast and full recovery.”
Image: Barack Obama (right) with Joe Biden at a campaign event in 2022. File pic: Reuters
British Prime Minister Sir Keir Starmer said he was “very sorry to hear President Biden has prostate cancer”.
“All the very best to Joe, his wife Jill and their family, and wishing the President swift and successful treatment,” he added.
After a poor debate performance against Mr Trump and amid escalating concerns for his health, Mr Biden withdrew from the 2024 election and endorsed his vice president Kamala Harris.
Ms Harris wrote on X: “We are keeping him, Dr. Biden, and their entire family in our hearts and prayers during this time.
“Joe is a fighter – and I know he will face this challenge with the same strength, resilience, and optimism that have always defined his life and leadership. We are hopeful for a full and speedy recovery.”
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1:16
Mr Biden’s diagnosis: What we know
Former US president Bill Clinton wrote on social media: “My friend Joe Biden’s always been a fighter. Hillary and I are rooting for him and are keeping him, Jill, and the entire family in our thoughts.”
Hillary Clinton, who unsuccessfully ran for president in 2016, said she was “thinking of the Bidens as they take on cancer, a disease they’ve done so much to try to spare other families from”.
Speaker of the US House Of Representatives Mike Johnson said it was “sad news” and his family “will be joining the countless others who are praying” for Mr Biden.
Former House speaker Nancy Pelosi described Mr Biden as a “great American patriot” and said she was “praying for him to have strength and a swift recovery”.
Mr Trump’s secretary of state, Marco Rubio, wrote on social media he and his wife were “united in prayer for the Biden Family during this difficult time”.
Following President Trump’s Middle East trip – which the White House is touting as an unbridled success – Sky News’ Martha Kelner sits down with Barbara Leaf, who was US ambassador to the United Arab Emirates during Trump’s first term and assistant secretary of state for Near Eastern affairs in the Biden administration.
She was also in the team that formed the first formal US presence in Syria after more than a decade.