UK's Prince Philip has 'successful' heart procedure

He will "remain in hospital for treatment, rest and recuperation for a number of days." said Buckingham Palace

Queen Elizabeth II's 99-year-old husband Prince Philip has undergone a successful heart procedure, Buckingham Palace said Thursday after he was transferred to a cardiac unit in London.

The Duke of Edinburgh "yesterday underwent a successful procedure for a pre-existing heart condition at St Bartholomew's Hospital," the Palace said, adding that he will "remain in hospital for treatment, rest and recuperation for a number of days."