Bahram Khel, the acting spokesperson for the provincial government, confirmed that the incident took place in Khash Rod district.
He said a vehicle carrying civilians struck a roadside bomb planted by Taliban militants in Khash Rod district on Wednesday.
Bahram Khel further added that the explosion killed 7 civilians and wounded another one.
The Taliban group has not commented regarding the incident so far.
Taliban militants and other insurgents often use roadside bombs to target the security forces but the majority of such attacks inflict casualties on ordinary civilians.