The attack targeted a minibus carrying staff from the NDS, Afghanistan's main intelligence agency.
The Afghan Taliban claimed responsibility for twin blasts near parliament offices in Kabul on Tuesday which they said had killed or wounded scores of people.
The attack targeted a minibus carrying staff from the NDS, Afghanistan's main intelligence agency, and as many as 70 people were killed or wounded, the insurgents said.
There was no immediate confirmation of casualty numbers from the
police.
The attack, which ended a period of relative calm in the Afghan capital, occurred in a crowded area during the afternoon rush hour as workers were returning home.
Officials said a suicide bomber blew himself up in the Darul Aman area of the city near the new parliament building and was followed immediately by a car bomber in an apparently coordinated operation.
Earlier on Tuesday, a suicide bomber killed seven people and wounded nine when he detonated his explosives in a house in the southern province of Helmand used by an NDS unit.