Suspects in bombing the Sistan-Balouchestan Province have been detained, Governor of Province Ali-Mohammad Azad said, the IRNA agency reported.
Azad said a terrorist group was behind the suicide bombing which occurred during the evening congregational prayers.
He said intelligence forces were quick to identify and arrest the terrorist group behind the incident who were trying to exit borders after the mosque bombing.
An explosion heard in the Ali Ibn Abitalib mosque in Zahedan city of Iran on May 28. The explosion has left 19 killed and 80 injured.
According to Azad, there were four children among killed, who came to mosque together with their parents.