Nelson Mandela's grandson Mandla has accused his relatives of seeking to control the former South African president's legacy.
His comments came as the bodies of three of Mr Mandela's
children were being reburied at the anti-apartheid icon's home village
of Qunu. On Wednesday police exhumed the bodies from Mandla's homestead, after court action by his relatives.
Mr Mandela, 94, remains "critical but stable" in hospital, a new update says.
President Jacob Zuma issued a statement after visiting the hero of the fight against white minority rule in a Pretoria hospital.
Madiba [Mr Mandela's clan name] is receiving the best medical care
from a multi-disciplinary team of health professionals who are at his
bedside around the clock," he said, again urging South Africans to
celebrate his birthday later this month.
Correspondents say there has been a long-running battle over Mr Mandela's legacy, but it has intensified as he nears the end of his life.
The dispute between Mandla and his relatives is linked to where Mr Mandela will be buried.
Court papers filed last week revealed that he has been on life support. He was admitted on 8 June with a recurring lung infection.
His wife Graca Machel on Thursday said Mr Mandela was sometimes "uncomfortable, but he has never been in pain".
'Mandela's assets' A group of the Mandela family, including his daughter Makaziwe and Mrs Machel, last week went to court, accusing Mandla of unlawfully relocating the graves of the three children to his village of Mvezo.