A Metrorail train driver was critically injured when two passenger trains collided in Pretoria on Thursday, said Tshwane emergency services.
A helicopter airlifted him to a nearby hospital at 9am, said emergency services spokesman Johan Pieterse.
He said 20 people were seriously injured in the crash at about 7am, and that 150 were "walking injured".
Police at the scene said one of the trains was stopped on the railway line between Cor Delfos and Saulsville when it was rammed from behind by another.
Among other things damaged were the powerlines on top of the trains.
Earlier, Pieterse said the railway line between Cor Delfos and Saulsville had been completely closed because of the accident
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