Eleven teenagers were wounded, two critically, after an argument between groups escalated into gunfire at a park birthday gathering in the US state of Georgia.
The attacks, which took place hours apart, come as South Africa continues to grapple with high levels of gang-related armed violence, BBC News reports.
The shootings, reported in separate incidents across South Africa, have left dozens of people dead.
The shootings, which occurred hours apart, add to a string of gun violence incidents that have drawn renewed attention to South Africa's security challenges.
Separate shooting incidents near the country's two largest cities on Saturday night added to a week of violence.
The shootings come amid what officials describe as an average of 58 murders a day nationwide, according to crime statistics.