15 injured in Pakistan blast
The explosion occurred as Friday prayers were underway at the mosque at Gol Chowk in Dera Bugti town.
Ahmedan Khan Bugti, a Pakistan Muslim League (Q) member of the National Assembly or lower house of parliament, and several worshippers were among the injured, police officials said.
The PML-Q is a coalition partner of the ruling Pakistan Peoples Party.
The injured were taken to two nearby hospitals.
Officials said some of them were in a serious condition.
Police officials the bomb was planted outside the wall of the mosque.
No group claimed responsibility for the attack.