Britain's Prince Philip has been admitted to the hospital for an exploratory operation related to an unspecified abdominal ailment.
Buckingham Palace announced that the 91-year-old Duke of Edinburgh -- who has been absent from several high-profile royal events beginning in May -- was admitted to the London Clinic and will undergo the operation on Friday under general anesthesia. He is expected to remain in the hospital for up to two weeks.
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Prince Philip pulled out of an event earlier this week due to illness and The Palace said he had undergone "abdominal investigations," but did not elaborate further. He later attended a service marking the 60th anniversary of his wife Queen Elizabeth's coronation.
The Duke of Edinburgh spent almost a week in the hospital last summer after the recurrence of a bladder infection.
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