The Queen's doctors are concerned for the health of the British monarch and recommend she remains under medical supervision, Buckingham Palace said in a statement on Thursday.
The queen, who is 96, has not been hospitalized and remains at Balmoral Castle, Buckingham Palace said.
Prince Charles, the heir to the throne, traveled to be with the queen in Scotland. Prince William
was also on his way, as was his brother, Harry.
Her son Prince Charles, her grandson Prince William
, Harry and other British royal family members have traveled to Balmoral Castle in Scotland to be by the 96-year-old monarch's side.
"The whole country will be deeply concerned by the news from Buckingham Palace," said new British Prime Minister Liz Truss, who met with the Queen on Tuesday.