Many people were killed in riots during store robberies, when police and the army used shock bombs and rubber bullets to quell the unrest.
More than 1,200 rioters were arrested in two provinces, where thousands of people stole food and other goods from stores.
Some people were killed in the explosions while trying to break into ATMs, and some from gunshots, police said.
Violence erupted in the provinces of Gauteng and KwaZulu-Natal after Zuma was detained on Thursday to serve a 15-month prison sentence for contempt of court.
He refused to act on a court order to testify in the investigation of allegations of corruption while he was president, from 2009 to 2018.
The riots broke out in the urban areas of the two provinces and have not yet spread to the remaining seven, where the police are on standby.
The robbery continued today in shopping malls in two provinces.
More than half of South Africa’s 60 million people live in poverty, and the unemployment rate is 32 percent.
The coronal virus pandemic has increased the hunger and despair of the people, which has contributed to the protests over Zuma’s arrest quickly escalating into unrest.