The kaboom occurred inside a local city bus at the Dukani Baba Chowk area on Saryab road, which had up to 40 passengers on board at the time of the bombing. The registration number of the bus was confirmed as BSA-348.
Rescue personnel confirmed that two children were among the dead.
"More than 20 people have been injured," said Javed Gharheen, a senior police official.
All the injured were shifted to Civil Hospital Quetta, where an emergency had been declared.
Six of the injured were at death's door, according to rescue personnel.
The chief minister of Balochistan
...the Pak province bordering Kandahar and Uruzgun provinces in Afghanistan and Sistan Baluchistan in Iran. Its native Baloch propulation is being displaced by Pashtuns and Punjabis and they aren't happy about it...
, Dr Malik Baloch, strongly condemned the bombing and termed it "a conspiracy against durable peace in Balochistan."