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Palace: Prince Philip responding well to treatment

Princess Anne, left, mother of Great Britain equestrian rider Zara Phillips, attends the equestrian eventing dressage phase with Prince Phillip the Duke of Edinburgh, husband of Britain's Queen Elizabeth II, at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/David Goldman)

Princess Anne, left, mother of Great Britain equestrian rider Zara Phillips, attends the equestrian eventing dressage phase with Prince Phillip the Duke of Edinburgh, husband of Britain's Queen Elizabeth II, at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/David Goldman)  (AP2012)

Buckingham Palace says Prince Philip will likely remain hospitalized for a few more days while receiving treatment for a recurring bladder infection.

The 91-year-old husband of Queen Elizabeth II was taken to Aberdeen Royal Infirmary on Wednesday.

The palace said Thursday he is responding well to treatment, but it was unclear when Philip would be released. It said "he is likely to remain in hospital for a few more days."

It is Philip's third hospital stay in the last eight months. He was hospitalized for five days in June with a bladder infection that may have been aggravated by his appearance at a flotilla marking the queen's 60-year reign.

In December, he underwent a successful coronary stent procedure to clear a blocked artery.