Former South African President and human rights leader Nelson Mandela is spending another day in the hospital Sunday, undergoing treatment for pneumonia.
On Saturday, officials said the anti-apartheid leader was resting comfortably and undergoing a procedure to clear fluid from his lungs.
Mr. Mandela was taken to an unidentified hospital late Wednesday.
He was hospitalized for three weeks in December with a lung infection and gallstones.
Concern runs high among admirers of the 94-year-old Nobel Peace laureate in South Africa, where he is considered a national hero, and elsewhere in the world.
U.S. President Barack Obama said Thursday he is "deeply concerned" about Mr. Mandela's health. He called Mr. Mandela an inspiration and a hero.
Mr. Mandela spent nearly three decades in prison for opposing apartheid in South Africa and became a symbol of the nation's peaceful transition to a democratic government after decades of suppression by the white minority. He became South Africa's first black president in 1994.