The White House said this evening that President Joe Biden had been briefed about the situation with Britain's ailing Queen Elizabeth and that his thoughts were with her and her family. "His and the first lady's thoughts are solidly and squarely with the queen today and her family," White House spokesperson John Kirby told reporters.
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Britain's Prince Harry is travelling alone to Scotland, without his wife Meghan, to be with his grandmother Queen Elizabeth, after doctors expressed concern about her health on Thursday, PA Media reported
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Britain's royal family rushed to be with Queen Elizabeth after doctors said they were concerned about the health of the 96-year-old monarch on Thursday and said she should remain under medical supervision.
Here is some reaction to the news:
BRITISH PRIME MINISTER LIZ TRUSS
"The whole country will be deeply concerned by the news from Buckingham Palace this lunchtime. My thoughts - and the thoughts of people across our United Kingdom - are with Her Majesty The Queen and her family at this time."
OPPOSITION LABOUR LEADER KEIR STARMER
"Along with the rest of the country, I am deeply worried by the news from Buckingham Palace this afternoon. My thoughts are with Her Majesty The Queen and her family at this time, and I join everyone across the United Kingdom in hoping for her recovery."
LEADER OF OPPOSITION LIBERAL DEMOCRATS ED DAVEY
"The whole nation's thoughts and prayers are with Her Majesty The Queen and her family as we all hope and pray for her full recovery."
FIRST MINISTER OF SCOTLAND NICOLA STURGEON
"All of us are feeling profoundly concerned at reports of Her Majesty's health. My thoughts and wishes are with the Queen and all of the Royal Family at this time."
FIRST MINISTER OF WALES MARK DRAKEFORD
"Concerned to hear the news from Buckingham Palace. I send my best wishes to Her Majesty and her family on behalf of the people of Wales."
ARCHBISHOP OF CANTERBURY JUSTIN WELBY
"My prayers, and the prayers of people across the @churchofengland and the nation, are with Her Majesty The Queen today. May God's presence strengthen and comfort Her Majesty, her family, and those who are caring for her at Balmoral."
PRESIDENT OF CATHOLIC BISHOPS' CONFERENCE OF ENGLAND AND WALES, CARDINAL VINCENT NICHOLS
"I am concerned to hear the news about the Her Majesty The Queen's health. I offer my prayers for her and her family. May the blessings of the Lord strengthen and comfort her and her family."
SPEAKER OF PARLIAMENT LINDSAY HOYLE
"I know I speak on behalf of the entire House when I say we send all the best wishes to Her Majesty The Queen."
PRIME MINISTER OF CANADA JUSTIN TRUDEAU
"My thoughts, and the thoughts of Canadians across the country, are with Her Majesty Queen Elizabeth II at this time. We're wishing her well, and sending our best to the Royal Family."
U.S. AMBASSADOR TO UNITED KINGDOM JANE HARTLEY
"I join the people of the United Kingdom, the United States, and across the world in sending our thoughts and prayers to Her Majesty The Queen and her family."
COMMONWEALTH SECRETARY-GENERAL PATRICIA SCOTLAND
"Like everyone, I am deeply concerned to hear the statement from Buckingham Palace today. On behalf of every nation and citizen of the Commonwealth family, I send my best wishes to Her Majesty and the Royal Family. She will remain in my prayers."
FORMER PRIME MINISTER TONY BLAIR, VIA HIS INSTITUTE
"It is deeply concerning to hear today's news from Buckingham Palace. My thoughts and prayers are with Her Majesty The Queen and her family at this worrying time."
FORMER PRIME MINISTER DAVID CAMERON
"Deeply concerned by the news this afternoon from Buckingham Palace. I send my heartfelt thoughts and prayers to Her Majesty The Queen and the Royal Family at this worrying time."
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British Prime Minister Liz Truss has no plans at the moment to travel to Scotland, her spokesman said , declining to comment on the situation surrounding Queen Elizabeth after doctors recommended she remain under medical supervision.
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British royals including Queen Elizabeth's grandson Prince William and her sons Princes Andrew and Edward have arrived in Scotland by plane to be with the ailing monarch, television footage showed this afternoon.
They will now make their way to Balmoral Castle, around an hour's drive away from Aberdeen Airport where they landed.
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Family members rushed to be by the side of Queen Elizabeth after doctors said they were concerned about the health of Britain's 96-year-old monarch today, saying she should remain under medical supervision.
The queen, Britain's longest-reigning sovereign and the world's oldest monarch, has been suffering from what Buckingham Palace has called "episodic mobility problems" since the end of last year.
"Following further evaluation this morning, The Queen's doctors are concerned for Her Majesty's health and have recommended she remain under medical supervision," the palace said in a statement. "The queen remains comfortable and at Balmoral."
Her eldest son and heir Prince Charles and his wife Camilla have travelled to her Scottish home Balmoral Castle, where she is staying, along with his eldest son Prince William, officials said. Last October, Elizabeth spent a night in hospital and she has been forced to cut back on her public engagements since then.
On Wednesday she cancelled a virtual meeting with senior ministers after being advised to rest by her doctors. The previous day she had been pictured appointing Liz Truss as the country's new prime minister at Balmoral.
A palace source said immediate family members had been informed and played down speculation that the monarch had suffered a fall.
Elizabeth has been queen of Britain and more than a dozen other countries since 1952, and earlier this year celebrated her 70th year on the throne. Truss said the whole country would be deeply concerned by the news.
"My thoughts - and the thoughts of people across our United Kingdom - are with Her Majesty The Queen and her family at this time," she said. Lindsay Hoyle, the speaker of the House of Commons, interrupted an energy debate in parliament to say he sent his best wishes to the monarch.
"Along with the rest of the country, I am deeply worried by the news from Buckingham Palace this afternoon," opposition Labour leader Keir Starmer said.