A police official said the bomb exploded on August 30 as hundreds of people were leaving a mosque in the city, which is the capital of Balochistan Province.
The car bomb went off at a nearby parking lot. No group immediately claimed responsibility.
Balochistan is home to Baluch nationalists who have waged a low-level insurgency for decades to demand more autonomy and control over the natural resources of the region.
Pro-Taliban militants are also active in the province, which borders both Afghanistan and Iran.
compiled from agency reports