Qari Jahangir, head of the justice department of the northern province of Kunduz was on his way to office alone, when bomb placed in his car exploded at the centre of Kunduz city.
Taliban spokesman Zabiullah Mujahid over from an undisclosed location accepted their responsibility in the incident. He said the remotely detonated bomb killed three more officials in the vehicle.
Meanwhile, the Afghan's interior ministry said that Wednesday, Aug 26 Kandahar blast, which was caused by a truck full of explosives claimed 43 lives and injured 65.
The blast, occurring when the residents were breaking their Ramzan fast destroyed dozens of houses, burnt a wedding hall and shattered windows up to one kilometre.
President Hamid Karzai condemned the attack and ordered further investigation.
The blast took one hour after the Afghan Independent Election Commission announced partial results of country's presidential election.