There was no claim of responsibility for the attack, one of three on Thursday in Balochistan, a key section of the China-Pakistan Economic Corridor (CPEC) energy and transport link project connecting western China with the Middle East and Europe.
Police said the attack took place during dinner time.
Pakistan has assured China that it can provide security for the USD 57 billion CPEC projects.
Two other attacks of a similar nature happened on the same day --one on a food court in Mastung, 55 km from Quetta, wounding 15 people, and unidentified gunmen riding on a motorcycle and firing at paramilitary soldiers, killing one and wounding four in west Balochistan. (ANI)