The sound bomb exploded in Iran's Kurdistan region
No one died because of explosion as Kurdustan region general prosecutor, İSNA reported.
The explosion took place under the bridge Nasir-Khosro in Samandaj. Only one bus was damaged by explosion. The explosion took place at 12:00 by local time.
The head of the Justice of Kurdistan, Ali Akbar Ghorousi said ISNA that the police is investigating this matter.
He said it's unclear that who or which group did this terror act.