Ailing Nelson Mandela at times unstable but showing 'great resilience' in hospital

Ailing former South African president Nelson Mandela is said to be showing great resilience though his condition becomes unstable at times.

The health of the anti-apartheid hero is still critical but stable, a statement from the South African president's office said.

The 95-yeard-old is in hospital in Pretoria two-and-a-half months after being admitted with a recurring lung infection, the BBC reports.

According to the report, the statement said doctors were still working hard to bring about a turnaround in his health.