Prince Philip, husband to the English Monarch, Queen Elizabeth has been hospitalized.

CNN reports that a statement from Buckingham Palace said the 99-year-old Duke of Edinburgh was rushed to a London hospital after feeling unwell.

According to the statement, Prince Philip is expected to remain in the hospital for a few days though the cause of his illness wasn’t revealed.

“His Royal Highness the Duke of Edinburgh was admitted into the King Edward VII Hospital in London, on Tuesday evening.

“The Duke’s admission is a precautionary measure, on the advice of His Royal Highness’s Doctor, after feeling unwell.

“The Duke is expected to remain in the hospital for a few days of observation and rest,” the statement said.