President Cyril Ramaphosa initially mobilised 2,820 soldiers in late March to help police enforce the confinement measures.

But a month later he deployed 73,000 extra troops to help implement the nationwide lockdown.

The South African National Defence Force (SANDF) on Friday said its deployment had expired on September 30.

The soldiers had "successfully contributed" to "the national effort to mitigate the spread of Covid-19," it said in a statement.

"Deployed forces will be confined to operational bases until further notice, with contingencies to render assistance in the event of a second wave," SANDF added.

Some security forces have been accused of heavy-handedness in enforcing South Africa's lockdown rules.

Military medical staff were also dispatched to some state hospitals to help shore up the health service, which was buckling under rising number of cases during the peak in July.

Despite its strict lockdown, South Africa has been relatively hard-hit, with more than 676,000 infections and 16,866 deaths recorded to date -- just under half the total number of cases detected on the continent.