According to Police, unknown persons opened fire at a basic health unit in Quetta due to which a police constable identified as Zainullah, who was sitting at the gate, was killed.
The slain cop was on duty with an anti-polio team.
A 12 year old boy was also injured in the shooting incident. The body and the wounded were shifted to Civil Hospital Quetta.
The attackers managed to escape from the scene. Police has initiated investigation of the incident.