The children were killed in a car crash on Friday
Emergency services confirmed the children were killed when the minibus they were travelling in crashed into a truck and exploded into a ball of fire.
The incident took place in Mpumalanga province, north of the capital Pretoria, near Gauteng.
Russel Meiring, ER24 spokesman said: "The number now is at least 17 fatalities."
About 20 children were in the minibus when it collided with the truck, he said.
No further information is available at this time.
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