Frontier Corps conducted a search operation in the city area of Qambrani where at least four miscreants, including the purported mastermind of a devastating bomb attack, were killed in an exchange of gunfire with the security personnel overnight and seven were arrested , officials said.
On the occasion, the miscreants entered exchange of fire with the security force that left four saboteurs dead.
The home secretary of Baluchistan province, Akbar Hussain Durrani, and Colonel Maqbool Ahmed from the paramilitary Frontier Corps said the killings and arrests took place during what they called an "ongoing operation".
"Those who were killed were high-profile targeted killers. They were involved in the killing of a Shiite judge and senior police officers," Durrani said.
One of the masterminds of Saturday's bombing in the Quetta suburb of Hazara Town was among those in custody, Durrani added.
The FC arrested several suspected miscreants from the area and shifted them to undisclosed location for interrogations.
Also, three bombs, detonators, mortar shells and numerous other firearms were seized from the criminals.