The incident left 20 others injured.
The incident occurred on the M-8 Motorway when a passenger bus, on its way to Rawalpindi from Khuzdar, passed by an explosives-laden roadside vehicle, reported Geo News.
At least 13 people were travelling in the bus.
Bodies of deceased people were shifted to Combined Military Hospital (CMH).
The incident occurred at a time when Pakistan was witnessing a spike in terror activities.