Cape Town — Archbishop Emeritus Desmond Tutu was admitted to hospital on Wednesday with a "persistent infection", the Desmond and Leah Tutu Legacy Foundation said.
"Archbishop Emeritus Desmond Tutu has checked into a Cape Town hospital for the treatment of a persistent infection and to undergo tests to discover the underlying cause," the foundation said in a statement.
He spent the morning in his office before checking into hospital.
"He was in good spirits and full of praise for the care he receives...
"Non-surgical treatment is expected to take five days," said the foundation.
The foundation declined to disclose the nature of the infection or which hospital he was admitted to, saying it wanted to ensure the family's privacy.
In December 2011, Tutu underwent an elective surgical procedure.
At the time, the Desmond Tutu Peace Centre declined to disclose the nature of the operation but said there was no cause for serious concern for the popular cleric who battled prostate cancer in the late 1990s.
Tutu celebrated his 81st birthday in October.
Editor's note: Story updated on April 24 at 18h27