According to Arif Jalali, head of the Herat Regional Hospital, the four victims and most of the victims were hospitalized.
No one has yet claimed responsibility for the blast, but it has taken place in an area inhabited by a Hazare minority. The Hazares are Shiites, and attacks on their neighborhoods are often carried out by a jihadist group called the Islamic State, which unites Sunni extremists who regard Shiites as heretics.