A suicide bomber targeting a bus of government employees near Kabul's biggest prison killed at least seven people on Wednesday.
Interior ministry spokesman Najib Danish said the attacker detonated explosives near a vehicle of the employees of the Pul-e-Charki prison on the outskirts of the Afghan capital.
In the latest Kabul attack, another five people were wounded in the blast.
There was no immediate claim of responsibility.
Afghan civilians continue to be killed in record numbers by anti-government armed groups this year, and the United Nations said the deaths have been the highest since 2014.
