Three foreigners and an Afghan interpreter were killed when a Taliban suicide bomber detonated his vehicle near Kabul International Airport on July 22.
Deputy Interior Minister General Mohammad Ayoub Salangi says the attacker drove a motorbike filled with explosives at the entrance to a complex housing foreign advisers to the Afghan government.
Six others were wounded in the attack.
The nationalities of those killed was not disclosed.
Taliban spokesman Zabihulllah Mujahid claimed responsibility for the attack, which also left several people injured.
Militants often fire rockets into the airport, causing little damage, but attacks on the heavily guarded facilities around the airport are rare as they are very well guarded by police and soldiers.