President Cyril Ramaphosa says two of the victims were foreigners who were killed during a wave of attacks on foreign-owned stores followed by apparent reprisal attacks in Nigeria.
Both countries step up security as deadly attacks on foreign-owned stores in Johannesburg spark reprisals against South African businesses in Nigerian cities.
Country hit by new wave of violence targeting foreign nationals and their businesses.
Mozambique's president and the leader of the country's main opposition group signed a new peace accord Tuesday, pledging to end years of violence and facilitate elections in the fall.
South African President Cyril Ramaphosa cut cabinet ministers from 36 to 28 to tackle "bloated" government and improve efficiency while appointing more women in cabinet to achieve gender diversity.
South African President Cyril Ramaphosa's inauguration followed his ruling African National Congress party's 57.5 percent victory in this month's election.
Zuma, who was forced to resign by the ruling ANC party last year, has been charged with 16 counts of fraud, racketeering and money laundering relating to the weapons deal dating back to before he took office in 2009.
South African President Cyril Ramaphosa leads ruling African National Congress to victory but a drop in its share of the vote underlines the challenge he faces restoring confidence in his party.
The governing African National Congress is ahead as ballot count continues in an election that has seen a low turnout.
The vote is seen as the toughest test yet for the governing African National Congress (ANC) party, 25 years after it swept to power at the end of white minority rule.
Three opinion polls in recent weeks show the ANC's support ranging between 51 and 61 percent, compared with the 62 percent it won in 2014.
South Africans go to the polls on Wednesday in one of the most competitive national elections since the first multiracial vote in 1994.
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