The vehicle went over the remotely-controlled bomb in Lower Kurram Agency on Friday, officials told Press TV.
Women and children were among the wounded.
The vehicle was on its way from the Parachinar city to the city of Peshawar when it was targeted.
No group has claimed responsibility for the explosion.
Following the blast, security forces and local tribesmen cordoned off the area and shifted the injured people to a local hospital.
The incident comes four days after two people were killed and several others injured in a roadside explosion in the Pir Qayum area of Lower Kurram Agency.
MS/AGB/HN/GHN
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