He asked the interior secretary to coordinate different law enforcement agencies to speed up the arrest of killers of eight people in Quetta.
He said a report should be presented to him after the arrest of culprits.
The PM also sought report of probable lapse in the security that led to the killing.
AFP adds: “At least nine Hazara Shiites were sitting in a minibus after buying vegetables when two gunmen opened fire on them with automatic weapons, killing eight of them and wounding another one,” senior local police official Imran Qureshi told.