Nelson Mandela has lung infection
South Africa's first black President Nelson Mandela is being treated for a lung infection, the president's office has said.
This is the first time officials have revealed why Mr Mandela, 94, was rushed to a military hospital in the capital, Pretoria, on Saturday.
Tests showed a "recurrence of a previous lung infection", presidential spokesman Mac Maharaj said.
Andrew Harding reports from Pretoria.