Prince Philip, 98, taken to hospital in London

Atlantic-Lens-Photography/iStock(LONDON) -- Prince Philip, the 98-year-old husband of Queen Elizabeth II, is being treated at a hospital, according to Buckingham Palace.

The Duke of Edinburgh was taken to King Edward VII Hospital in London for "observation and treatment in relation to a pre-existing condition," the palace said in a statement.

"The admission is a precautionary measure, on the advice of His Royal Highness' Doctor," the statement read.

Philip, who retired from official royal duties in 2017, walked into the hospital on his own and this was a planned admission to the hospital, according to ABC News royal contributor Victoria Murphy.

He traveled from Norfolk, England, where the queen has her country estate Sandringham, to London on Friday for the medical care.

On the same day, Queen Elizabeth traveled from London to Norfolk to begin her Christmas holiday. She will remain in Norfolk until Feb. 6, the anniversary of the death of her father, King George VI.

The royal family plans to spend Christmas at Sandringham, per tradition.

This is a developing story. Please check back for updates.

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