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.
Two groups exchanged gunfire during a birthday party at a city park in the U.S. state of Georgia, a sheriff said.
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.
James Copenhaver, 76, had lived with lingering injuries since being shot during the rally in Butler, Pennsylvania, where a gunman also grazed Donald Trump's ear.
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.
Police say two unrelated attacks near Johannesburg and Cape Town left dozens dead in one of the deadliest nights of violence in recent memory.
Police say the attacks in Cape Town and Johannesburg were unrelated, and no suspects have been arrested in either case.
South African police say 17 people were killed at a bar near Johannesburg and 10 more in a separate attack at a store near Cape Town, in two mass shootings hours apart.
South Africa is grappling with two separate mass shootings that killed a combined 27 people, underscoring the country's continuing struggle with gang-related armed violence.
Emergency services declared all 17 victims dead at the scene in Wedela, southwest of Johannesburg, as police search for eight suspects.