It was earlier reported that two had died in the incident that occurred near Jalalabad Road in Kabul's PD9 area.
Police were quoted by Tolo News, as saying that a suicide car bomber had detonated his explosives near a compound housing foreign contractors at around 9 a.m.
Afghanistan's Interior Ministry also confirmed that four other people had been injured in the incident.
The Taliban has claimed responsibility for the attack. (ANI)