In the first incident, unidentified men gunned down President of PML-N Khuzdar city chapter Muhammad Alam Jattak in Khuzdar, Express News correspondent Shah Hussain reported.
In a separate incident, a head constable of the police and a passerby were shot dead in Pashtoonabad area of Quetta.
Initial reports suggest that it was a case of personal vengeance.
The bodies of the deceased have been shifted to a local hospital.
Police has reached the scene of crime and further investigations into the incident are underway.
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