In Quetta, armed men on a motorcycle fired at three people near Jinnah town, killing two of them and injuring the third.
The deceased were identified as Tahiruddin and Mohsin Nasir and the injured as Mohsin Ali.
In Khuzdar, a man was killed when his car was attacked on the Masjid road.
Abdul Karim Raisani died on the spot while his driver Mohammad Azam was injured.
Two Bugti tribesmen were killed and four injured when a landmine exploded in Pir Koh area of Dera Bugti.
Sources said the tribesmen were collecting firewood when they stepped on the mine.