
A Levies official said that an explosive-laden motorcycle exploded when the bus drove past it, completely destroying the vehicle. The official added that the number of casualties may rise.
It was reported that the bus was carrying around 60 people.
The explosives were connected to a time-device.
One body was shifted to Provincial Sandeman Hospital in Quetta while the other was brought to Civil Hospital in Mastung.
Thirteen injured were shifted to hospitals in Mastung, while 23 people who sustained serious injuries were moved to Bolan Medical Complex Teaching Hospital in Quetta.
It could not be ascertained who was targeted in the attack.
Security forces cordoned off the area in order to initiate investigations.
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