Johannesburg - Former South African president Nelson Mandela was admitted to hospital on Saturday for a "routine test", his second period of hospital treatment in less than three months, the government said.
A spokesperson for President Jacob Zuma said there was "no need for panic" and that doctors were treating Mandela for a pre-existing condition consistent with his age.
It did not reveal any more details about the condition of the 94-year-old anti-apartheid leader, other than to say he was in a hospital in the capital, Pretoria.
The tone of the government's announcement was in keeping with previous announcements about Mandela's health.
Mandela spent nearly three weeks in hospital in December with a lung infection and after surgery to remove gallstones. It was his longest stay in hospital since his release from prison in 1990.
Since his release on 26 December he has been receiving treatment at his Johannesburg home.