The office of President Jacob Zuma said in a statement Thursday that the 94-year-old former president and anti-apartheid leader went to the hospital just before midnight on Wednesday.
The statement says Mandela is being treated for a "recurrence of his lung infection" and that doctors are ensuring he has the best possible treatment.
Zuma wished Mandela a speedy recovery and he urged South Africans and the world to pray for the former leader and his family. Mandela has become increasingly frail in recent years.
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