It gave no details but stated that there was no cause for alarm about the health of the 94-year-old anti-apartheid leader.
Presidential spokesman Mac Maharaj said Mr Mandela, 94, would undergo further tests for an undisclosed condition.
On Sunday Mr Mandela was visited by President Jacob Zuma, who said he was looking well after a restful night.
News of the hospital stay has prompted much concern in South Africa.
But Mr Maharaj said Mr Mandela was “comfortable” and there was “no cause for alarm”. “[Mr Mandela] had a good night’s rest. The doctors will still conduct further tests today [Monday]. He is in good hands,” Mr Maharaj said in a statement.
“Today is also a special day as President Mandela received the Nobel Peace Prize on 10 December 1993… for his selfless contribution to the struggle for liberation, human rights and justice in South Africa.” The M wishes Mr. Mandela a speedy recovery. 🙂
(via huffington post and BBC News)