The bodies of at least six suspected zama zamas (illegal miners) were confirmed to have been found at the Maraisburg highway offramp on Wednesday morning.
Saps, forensic pathologists, Gauteng traffic police and the Johannesburg Metro Police Department (JMPD) are currently at the scene.
Bosmont community patroller Faried Domingo told The Citizen he suspected the attack was the result of ongoing zama zama infighting.
The bodies were found scattered across both sides of the highway.
JMPD spokesperson Xolani Fihla said the victims appeared to have been shot and stabbed to death.
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