Buckingham Palace has released a statement regarding the health of Queen Elizabeth II.
On Thursday (September 8), the Palace revealed that the 96-year-old monarch is currently remaining "under medical supervision" following an evaluation by her doctors.
The brief statement reads, in full: "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 Queen remains comfortable and at Balmoral."
BBC News adds that Her Majesty's immediate family has been informed, with Prince Charles reportedly with her.
The Duchess of Cornwall has also traveled to Balmoral and Prince William is reportedly on his way.
The announcement comes after she was forced to pull out of a virtual Privy Council on Wednesday, with doctors advising her to rest.
On Tuesday, Her Majesty appointed Liz Truss as the United Kingdom's new prime minister after the latter won the summer Conservative leadership bid.
The occasion took place at Balmoral, as the Queen did not travel into London for the event.
In response to today's news, the new PM tweeted that the country should be "deeply concerned" about the Queen's wellbeing.
"The whole country will be deeply concerned by the news from Buckingham Palace this lunchtime," Truss tweeted. "My thoughts - and the thoughts of people across our United Kingdom - are with Her Majesty The Queen and her family at this time."
Back in June, Queen Elizabeth II celebrated her Platinum Jubilee, with the entire nation enjoying a long weekend of celebrations to mark Her Majesty's 70-year record reign.