The  condition of South Africa's former President Nelson Mandela has improved  further, the government said on Sunday, as the 94-year-old anti-apartheid hero  spent a fourth day in hospital receiving treatment for pneumonia.
"Nelson  Mandela had a restful day," South Africa's presidency said in a statement,  adding doctors treating him had reported "a further improvement in his  condition".
"Government  is satisfied that the doctors are providing the former president with the best  medical care possible to enable his recovery and comfort," the statement  said.
In  their first detailed report of his condition, doctors said on Saturday that  Mandela had "developed a pleural effusion which was tapped", meaning  they had drained excess fluid from around his lungs.
It  is his third visit to hospital in four months, raising new concerns about the  health of the Nobel Peace Prize laureate.
Mandela,  who became South Africa's first black president in 1994, is revered at home and  abroad for leading the struggle against white minority rule, then promoting the  cause of racial reconciliation when in power.
He  stepped down as president in 1999 and has not been politically active for  around a decade.
President  Jacob Zuma on Sunday thanked "the thousands of South Africans who prayed  for Madiba at various Easter church services during the weekend." Madiba  is Mandela's clan name.
"We  also thank foreign governments for their messages of support," Zuma said.  Global figures such as U.S. President Barack Obama have sent get well messages.
In  the Regina Mundi Catholic Church in the sprawling black township of Soweto that  Mandela once called home, worshippers attending Easter service prayed for the  man seen by many as the father of their nation.
"We  hear that the government tells us that he's okay, that he's still undergoing  treatment for his lung condition, and as I say, we pray that God's healing hand  may be upon him," Father Sebastian Russouw said during the service.
Mandela  was in hospital briefly earlier in March for a check-up and spent nearly three  weeks in hospital in December with a lung infection and after surgery to remove  gallstones.
He  has a history of lung problems dating back to when he contracted tuberculosis  as a political prisoner.
He  spent 27 years in prison on Robben Island off South Africa's Atlantic coast and  other jails for his attempts to overthrow apartheid rule.
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