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An eyewitness, Joash Bor, who was travelling to his home in Chepsir at the time of the incident, recounted the horrifying moments leading up to the collision.
Bor described how he witnessed the Probox attempt to overtake a vehicle ahead of it before colliding head-on with the oncoming trailer.
"The vehicle was cut into two, and the bodies hurled out of the wreckage. I have never witnessed such an accident before," he remarked.
Bor further alleged that both vehicles were travelling at high speeds just moments before the collision occurred.
"The trailer dragged the Toyota Probox along the road for at least 70 meters," he said.
The bodies of the deceased were moved to Kericho County Hospital Mortuary.