Nelson Mandela has been re-hospitalized with a recurrence of a lung infection, say sources.
In a statement on Thursday, President Jacob Zuma's office said that the 94-year-old Mandela was hospitalized just before midnight on Wednesday.
The statement added that he was receiving the 'best possible expert medical treatment and comfort'.
According to the Telegraph, Zuma wished Mandela a speedy recovery and he urged South Africans and the world to pray for the former leader and his family.
Local media claim he is unable to breathe properly and has been put on a ventilator.
Mandela was admitted to hospital for nearly three weeks in December with a lung infection, and while he was there he underwent an operation to remove gall stones, the report added.