Former South African President Nelson Mandela's current hospitalization is due to a lung infection, authorities said Tuesday. Doctors were treating Mandela and he was responding to treatment, a statement from President Jacob Zuma's office said. Mandela, 94, was hospitalized over the weekend at a Pretoria facility but the exact nature of his ailment had not been released. Tuesday's statement said he had a recurrence of a previous lung infection, according to a report of CNN.