However, the nature of the blast is yet to be ascertained.
Home Minister of Balochistan Sarfraz Bugti claimed that Islamic State is not operating in Pakistan, Samaa reported.
The injured have been shifted to Quetta's Civil Hospital where an emergency has been imposed.
Security forces have cordoned off the area and kicked off a search operation in the surroundings.
The Pakistani Taliban claimed responsibility for the attack in an email sent to members of the media.
An investigation is underway to determine whether it was a suicide bombing or whether the explosives-laden vehicle was detonated remotely when the police truck was passing by, he said, adding that the death toll could increase.
At least 22 people, including civilians, were injured in the attack, Khan said.
"We can not yet say that this is a suicide attack, our teams are in research and investigations at scene", Cheema said.
Earlier in June, 14 people - including seven policemen - lost their lives in a suicide blast that shook Shuhada Chowk in Quetta's Gulistan Road area.
Also Wednesday, a roadside bombing near a tribal area along the border with Afghanistan killed two troops. The blast which was carried out remotely occurred near Kajhori check post when the security forces were patrolling the area, a security official said, adding the IED had been planted along Miran Shah road.
Prime Minister Shahid Khaqan Abbasi also condemned the attack and directed authorities to provide best medical treatment to the injured.
A local commander of the Pakistani Taliban, Sharyar Mahsud, said his men were responsible for the attack. Afterward, he said such attacks would not bring down the morale of the security forces.
Fifteen people, including eight soldiers, were killed when a suicide bomber targeted a military truck near the Pishin bus stop in Quetta on August 13.
After saying he had written letters to the families and planned to call them next week, he criticized former presidents. I don't know what (George W.) Bush did. "I was told that he didn't often, and a lot of presidents don't".
Now he gets to introduce Black Panther to young children too and this trailer shows that he isn't taking this opportunity lightly. While the super-hero genre is becoming more and more exposed, Marvel has found, yet again, another way to make it feel fresh.
Mark Jenkins, a spokesman for AAA and the Auto Club Group, said he expected prices to continue to drop across the Sunshine State. The Great Lakes, which saw a large uptick, will likely lead the nation this week with declines.
He also confirmed that there was some cleaning being done on the platform, but did not specify the exact cause for the explosion. The platform is a storage and accumulation point for oil and gas from a number of wells, company spokesman Tim O'Leary said.
The Kurdish-held multi-ethnic region of Kirkuk has emerged as a flashpoint in the crisis as it is claimed by both sides. The General Command of Peshmerga Forces released a statement saying the situation "has unsafe indications for war".
Ingram's top performance this season until Sunday was a 14-carry, 56-yard showing against the Carolina Panthers on September 24. And we wanted to prove that we can carry this team running the ball, receiving the ball and being playmakers for this offense".
If I take care of the ball like I'm supposed to and don't let it move or anything like that, we don't have this discussion. It's frustrating form that standpoint, but we had other plays in the game we could've made to make up for that".
The important thing to note here is that you get 5GB total between Canada and Mexico - not 5GB per country. After the users have exceeded 80% of the 5GB limit, they will be sent an alert message from T-Mobile.
India pip Pakistan in Asia Cup hockey
However, Pakistan could not make the pressure count and India, again, emerged victorious over them in this tournament. Q3 32'min: Yellow Card - There is another yellow for Pak for stick check after two umpires consult, for Abu Mahmood.