The incident took place in Quetta, the capital of Balochistan, which has been wracked by separatist and Islamist violence for more than a decade.
At least four police officers including a Superintendent of Police (SP) have been killed in a brutal firing incident in Quetta today (Thursday).
According to police, the senior police official along with a police team was patrolling near Killi Deba when armed assailants opened fire on them and fled from the scene.
Police have termed the incident as target killing.
The latest incident of terrorism came three weeks after a powerful vehicle bombing near the office of IG Balochistan killed 14 people and wounded 20.
In a statement, Prime Minister Nawaz Sharif strongly condemned the attack on policemen.
Chief Minister Balochistan Nawab Sanaullah Khan Zehri said nefarious designs of terrorists would be thwarted at all costs.
He expressed condolence with families of the martyred police officers and prayed to Almighty Allah to rest the departed souls in eternal peace.
Resource-rich Baluchistan has always been plagued by insurgencies by separatists. Taliban and other extremist militants also operate in the province, which shares borders with Afghanistan and Iran.