A convoy of the Frontier Corps was targeted in a blast on Saryab Road in Quetta on Tuesday.
At least two people were killed and 16 injured as a result of the blast. The dead included a student in his early teens.
Five security personnel and a police constable were among the injured.
It has also been reported that families of the FC personnel were traveling with the convoy at the time of the blast.
Express News correspondent Irfan Rana reported that the blast took place near WAPDA Grid Station when the FC convoy was passing by. Initial reports had suggest that this could have been a remote controlled bomb.
Police officials have claimed that the bomb was planted inside a car.
Nearby transportation also caught fire after the blast.
Police and security personnel cordoned off the area and emergency teams were dispatch to the site.
An emergency was declared at Civil hospital after the blast.
Correction: Express News had earlier reported that five people were killed as a result of the blast. The death toll has been corrected in the story.