The truck was carrying police recruits, five of whom were martyred, along with two passers-by on the city's eastern outskirts, Quetta Police Chief Abdur Razzaq Cheema said. The nature of blast is yet to be ascertained.
The Balochistan area has constantly been on the target of miscreants.
Quetta Police chief Abdur Razak Cheema said auto was detonated by bomb, security forces of vehicle, four policemen on vehicle, and two people who passed road during explosion of vehicle lost ir lives.
Rescue teams have also reached the sport while the injured persons have been shifted to the Civil Hospital for treatment.
"Such cowardly acts will not deter the government and people of Balochistan from doing their duties", Bugti said, adding the fight will continue till the elimination of the last terrorist. "Balochistan is on the forefront of this fight and we will not stop until there is not a single terrorist left in the area", Bugti said. Afterward, he said such attacks would not bring down the morale of the security forces.
Security forces have cordoned off the area and kicked off a search operation in the surroundings.
Baloshistan has witnessed several blasts and targeted killings in the past few months.
The roadside bombing that killed two members of Pakistani paramilitary forces struck near a security post close to the North Waziristan tribal region, two intelligence officials told The Associated Press.
In October 2016, armed militants wearing suicide vests stormed a police academy in Quetta, killing at least 61 people and wounding at least 117 in the deadliest attack on a security installation in the country's history.