JOHANNESBURG (AP) -- South Africa's presidency says 94-year-old Nelson Mandela is responding positively to hospital treatment for a recurring lung infection.
The office of President Jacob Zuma also said in a statement Thursday that the former president and anti-apartheid leader remains under observation.
Mandela was admitted late Wednesday to a hospital in Pretoria, the South African capital.
Mandela contracted tuberculosis during his 27-year imprisonment for fighting white racist rule in South Africa. He has repeatedly had lung problems.