South Africa's government has said the 94-year-old Mandela was admitted Dec. 8 to a hospital in the country's capital, Pretoria. Officials said Mandela underwent an endoscopic surgery to remove gallstones Saturday after doctors treated him for a recurrent lung infection.
On Tuesday, President Jacob Zuma said in a statement that Mandela required "extraordinary care" due to his age and could spend several more days in the hospital recovering.
Mandela is revered for being a leader of the struggle against racist white rule in South Africa, serving 27 years in prison for his beliefs. He served one five-year term as president before retiring from public life.
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(Photo: AP Photo/Schalk van Zuydam, File)