Evert du Preez and Mokoni Chaka say they can still remember the screams.
"I saw the train hit the car. I went to the train and saw kids coming out the windows and helped them and took them to the ambulance. I will never forget the screams. It will forever be embedded in my mind," said Du Preez.
Chaka said: "When I was there I saw the train hit the truck and there was fire following the train. I heard kids screaming and we helped them out and took them to the ambulance. What I saw was very sad."
It was reported that they had helped desperate mothers find their babies.
At least 19 people died in the collision of the train and a truck, although authorities have not confirmed a final figure.
More than 250 people were injured.