Nelson Mandela - former South African President has undergone a successful surgery to remove gallstones from the bladder, say sources.
The 94-year-old former president and anti-apartheid leader underwent the operation early on Saturday after a week in hospital suffering from a recurrent lung infection.
According to the Telegraph, doctors had wanted to treat that infection before putting him through the endoscopic procedure to remove the gallstones, the government said.
"The procedure was successful and Madiba is recovering. It referred to Mandela by his clan name as a sign of affection," a statement, which referred to Mandela by his clan name, said.
Two days earlier the authorities offered another reassuring report on his condition, saying that he had 'made progress' in overcoming a lung infection and doctors 'are satisfied with the way he is responding to treatment', the report said.
This has become the longest continuous period Mandela has spent in hospital since 2001, when he underwent seven weeks of radiotherapy after being diagnosed with prostate cancer, the report added.