A vehicle belonging to the Balochistan Constabulary was travelling on Mastung Road in Quetta when unknown motorcyclists hurled a hand grenade at it.
Five constabulary personnel, three children and three others were injured in the attack. They were taken to Combined Military Hospital and Civil Hospital for treatment.
Security forces reached the attack site and cordoned off the area. A search operation was conducted in the area as a probe into the incident went underway.