Former South African president Nelson Mandela is undergoing further tests in hospital in Pretoria, where he was admitted on Saturday. It is the second time the 94-year-old anti-apartheid leader has been hospitalised in the past year.
Government officials have worked to allay fears over his health, but have not released any details of his medical condition, except to say the tests and medical attention he is receiving are consistent with his age, the ABC reports.
South African president Jacob Zuma visited Mr Mandela and told media he was "comfortable, and in good care".
The statesman was flown from his rural home in Qunu to a military hospital in Pretoria on Saturday.
He has not appeared in public since South Africa hosted the FIFA World Cup final in 2010.