Officials say criminals targeted police officers in Balochistan capital in two separate incidents.
Four policemen were killed in two separate attacks in Quetta on Wednesday, according to officials.
In the first incident, a group of criminals ambushed a police party on a major road in the Balochistan capital, as they were preparing to launch an arrest raid. The police driver and another officer were injured and died from their wounds before they could be transferred to hospital.
In a second attack, two gunmen on a motorbike opened fire at a pair of police officers in a minority Hazara Shia community area as they were going to buy food for their evening meal. Both policemen died at the scene.
Manzoor Sarwar, a senior police official in the city, said that authorities were investigating the attacks. Another police official Zahoor Afridi confirmed the causalities.
The mineral-rich Balochistan province has been plagued for decades by separatist insurgency and sectarian killings. Hundreds of members of the ethnic Hazara Shia community have been killed there in recent years.