Former South African leader Nelson Mandela is in "serious but stable condition" after returning to a hospital with a recurring lung infection, the presidential office said Saturday. Mandela was taken to a Pretoria hospital early Saturday after his condition deteriorated, Jacob Zuma's office said in a statement. "Doctors are doing everything possible to make him better and comfortable," the statement said. Mandela, 94, has become increasingly frail over the years and has not appeared in public since South Africa hosted the World Cup in 2010, according to a report of CNN. He suffered from tuberculosis during his imprisonment and has battled respiratory infections over the years. His history of lung problems dates to when he was a political prisoner on Robben Island during apartheid. The former president has been hospitalized several times recently for lung infection and pneumonia.
