Former South African President Nelson Mandela, who is admitted to a hospital in Pretoria, is undergoing kidney dialysis, media reports said.
"Former South African President Nelson Mandela has been getting kidney dialysis and opens his eyes when people talk to him," CNN reported quoting a source.
South Africa´s Presidency earlier said Mandela is critical but he is not in a ´vegetative state´.
"The Presidency has noted media reports about the condition of former President Nelson Mandela and would like to make a clarification. Former President Mandela has been and remains under the care of a multi-disciplinary panel of South African medical experts drawn from the South Africa Military Health Services, the public sector, the universities and the private sector," said the Presidency in a statement on Thursday.
"Under this panel a team of doctors, nurses, paramedics and other health professionals attend to Madiba on a 24 hour basis," it said.
"We confirm our earlier statement released this afternoon after President Jacob Zuma visited Madiba in hospital that Madiba remains in a critical, but stable condition. The doctors deny that the former President is in a vegetative state," said the Presidency.
Media reports quoting Mandela´s family members said the leader has been breathing through medical life support measures.
In court documents, Mandela´s family members reportedly described his condition as "perilous".
"Affidavits will be provided at the hearing of this application from his [Mandela's] treating physicians that he is assisted in breathing by a life support machine," the South African Press Association (SAPA) reported quoting court documents by Mandela´s daughter Makaziwe Mandela and other members of his family.
More than a dozen members of Mandela´s family submitted the papers on June 28 in Eastern Cape High Court.
According to reports, Mandela´s family members submitted the documents as part of legal efforts to recover the remains of three of his children.
Mandela was admitted to the hospital in Pretoria on June 8 with a recurrence of lung infection.
Mandela will turn 95 on July 18.
Earlier, the 94-year-old Nobel Peace Prize winner was hospitalized on Mar 27 for pneumonia and a recurring lung infection.