The assailants have repeatedly targeted security personnel and government officials in the area.
Quetta, Razzaq Cheema said the security personnel was on a routine patrol when they were attacked by miscreants in Dukkani Baba area of Sariab Road in the city.
The Taliban militants on Wednesday killed four paramilitary soldiers in an ambush in Pakistan's restive southwestern Balochistan province, police said.
As a result, four FC personnel received fatal firearm wounds and were rushed to Civil Hospital Quetta, where doctors pronounced them dead. Further probe has also begun after collecting empty shells and other evidence from the location. An investigation is underway.
Muazzam Jah, inspector general of Balochistan police, said there was no CCTV camera in the area of the attack.