A car carrying explosives detonated while the convoy of a security official from a neighboring province was driving by, the officials said. Three of his guards were wounded in the explosion.
There were no immediate claims of responsibility for the attacks.
Randhawa paid for the bomb using crypto-currency and arranged for its delivery to an address away from his home.
According to the officials, the bomb went off hidden beside a car parked near Science College on Jinnah Road. The deceased and injured have been shifted to Quetta Civil Hospital.
Afghan Interior Ministry spokesman Nasrat Rahimi rejected the Taliban's claim and wrote on social media that 'he enemies' claim that gunmen entered the Green Village complex is untrue'.
In southern Ghazni province, the insurgents stormed a security compound, using a suicide car
According to the local reports, it was likely a car bomb that sent a column of black smoke into the sky at the southern Iraq's city of Basra.
Daphne Caruana Galizia, 53, had just driven away from her home in Mosta, when the bomb went off.