Doctors are concerned for the health of Britain's Queen Elizabeth II and have advised that she remains under medical supervision, Buckingham Palace said Thursday.
"Following further evaluation this morning, The Queen's doctors are concerned for Her Majesty's health and have recommended she remain under medical supervision," Buckingham Palace said in a statement.
It added that the queen, 96, remains comfortable and at Balmoral, the queen's royal residence in Scotland.
Immediate family members have been informed and are currently traveling to Balmoral.
Prince Charles and his wife, Camilla, the Duchess of Cornwall, have already arrived and Prince William, the Duke of Cambridge, is currently on his way.
The queen, who is the world's longest-serving monarch, has been said to be suffering from deteriorating health for the past several months, with doctors citing ongoing "mobility issues."
Her Majesty was forced to cancel a planned virtual meeting with senior ministers after being advised to rest by her doctors.
Britain's new Prime Minister Liz Truss, who was formally installed by the queen on Tuesday, said her thoughts were with Her Majesty and her family.
"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.
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