Former president FW de Klerk was hospitalised on Friday.
His foundation said on Saturday that he was being treated at the Panorama Hospital in Pretoria for a condition known as pneumothorax – which is an abnormal collection of air in the pleural space between the lung and the chest wall.
“He underwent a successful procedure this morning and it is expected that he will be discharged from hospital some time next week‚” the foundation said.
A Nobel peace prize laureate‚ De Klerk‚ 82‚ served as the last president of South Africa during the apartheid era.