ER24 spokesperson Russel Meiring said the child was believed to have been about 13 years old.
Meiring said all three victims had already succumbed to their injuries when they were found at about 8am.
“It would appear that the three patients were bound, gagged and burned to death, but is subject to postmortem and law-enforcement investigation,” he said.
Local authorities were on the scene to conduct further investigations.
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