South African President Jacob Zuma ' s office says former President and anti - apartheid icon Nelson Mandela is transferred to hospital, as his lung infection deteriorates.On Saturday, the presidency said Mandela who was taken to a hospital in Pretoria for recurrence of lung infection is in "serious but stable condition." According to a statement from Zuma's office, the 94-year-old was taken to hospital around 1:30 am. "The former president is receiving expert medical care and doctors are doing everything possible to make him better and comfortable," the statement added. Mandela has a history of lung problems dating back to when he contracted tuberculosis as a political prisoner. On Mar 28, he was rushed to a South African hospital for the same problem. He also spent about three weeks in hospital for a similar infection and gallstones in December 2012. In South Africa, Mandela is often known as Madiba, his clan name, or as tata, which means father. He is widely regarded as the father of the nation for leading the struggle against apartheid. Mandela served as South Africa’s first Black president from 1994 to 1999. The former South African president has received more than 250 awards over four decades, including the 1993 Nobel Peace Prize. In recent years, Mandela’s health problems have worried his supporters.