*Former South African President Nelson Mandela, who is 94 and has been in the hospital since Saturday for tests, has suffered a recurrence of a lung infection but is responding to treatment, the government said on Tuesday.

The anti-apartheid leader and Nobel Peace laureate is spending his fourth day in a hospital in the South African capital Pretoria.

“Doctors have concluded the tests, and these have revealed a recurrence of a previous lung infection, for which Madiba is receiving appropriate treatment and he is responding to the treatment,” the government stated.

Mandela, whose clan name is Madiba, was admitted to the Pretoria military hospital on Saturday after being flown from his home village of Qunu, which is in a remote, rural part of the Eastern Cape province.

In an interview late on Monday with South Africa’s eNCA television channel, Mandela’s Mozambican-born wife Graca said the former president’s “sparkle” was fading.