According to the Dawn, the hand grenade accidentally exploded which killed the mother and her daughter and injured her son.
Makran Division Commissioner Bashir Bangulzai said the boy found a hand grenade somewhere and took it to his home.
It exploded when the boy was playing with the grenade in the Tusp area of Panjgur, Bangulzai added.
The boy was rushed to the hospital for medical assistance.
An investigation has been launched into this matter. (ANI)