Former South African president and anti-apartheid icon Nelson Mandela is "responding to medication and treatment," but doctors are concerned about the number of people visiting him, the nation's acting president said in a statement Monday.

Mandela, 92, was discharged from a Johannesburg hospital on Friday after treatment for an acute respiratory infection, South Africa's surgeon general, Veejay Ramlakan, said.

The team looking after Mandela, headed by Ramlakan, said he had a "peaceful and restful night" Sunday night, acting President Kgalema Motlanthe said....