Police and rescue officials soon reached the spot and have started rescue work and at least 15 injured were moved to Quetta's Civil Hospital.
Middle East-based Islamic State, which has a branch of loosely affiliated fighters in Afghanistan and Pakistan, claimed the attack shortly afterwards, saying a motorcycle suicide bomber had killed 17 soldiers.
Several cars parked at the site caught fire after the blast, which also smashed window shutters and doors of the nearby buildings and shops. Attacks have also been reported by groups related to the Taliban.
The area was cordoned off following the blast, with a high-level search operation being initiated.
Army chief General Qamar Javed Bajwa condemned the terrorist attack on the army truck in Quetta which he called "an attempt to mar Independence Day festivity" in the country. However, military intelligence officials denied the Wadh network exists and the father of the alleged leader says his son is not involved with militants attacking the state.
Alcoholism among women rises in new study
The new findings are based on face-to-face interviews with nationally representative samples of adults in 2001-2002 and 2012-2013. The number of adults who suffered from an alcohol abuse or dependence grew from 17.6 million to 29.9 million over that decade.
Jamaican team hold Usain Bolt's fate in their hands
I did it for the fans. "I don't think it gets any worse than that", he said, referring to the problems in Russian Federation . Bolt admitted he was disappointed but would never change his idea of retiring because the new life ahead is more inviting.
Wall St ends off lows as traders buy N. Korea dip
European markets fared much the same fate with the DAX closing 1.12% lower at 12,154.00, and the CAC 40 down 1.40% at 5,145.70. As impressive as that is, the Dow is only up about 400 points, or 1.8%, during its recent string of records.