Six people were killed in a head-on collision on the N2 freeway near Riviersonderend in the Western Cape, the SABC reported on Wednesday.
Metro emergency services said a car carrying six people overtook a truck and collided head-on with an oncoming minibus on Tuesday night.
Two women, a man and three children, from Mandalay near Kuils River, died on the scene.
Thirteen passengers from the minibus suffered injuries and were taken to a nearby hospital.
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Cosatu met with the Public Protector to discuss its numerous complaints against Premier Helen Zille.
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