South Africa’s former President Nelson Mandela is suffering from a recurring lung infection, the president’s office said Tuesday. Mandela, 94, has been hospitalized since Saturday to undergo medical tests at 1 Military Hospital near South Africa’s capital, Pretoria. The tests showed that Mandela is suffering from a lung infection, AP quoted presidential spokesman Mac Maharaj as saying. “Madiba is receiving appropriate treatment and he is responding to the treatment,” Maharaj said, referring to Mandela by his clan name. The presidency’s statement was intended to end speculation about what caused the hospitalization.