"These individuals played an influential role in transferring two bombers into the Sistan and Balouchestan Province from beyond borders, providing explosive belts, explosives and also sheltering the bombers," he added.
The perpetrators have confessed that the enemies' provocations to sow discord between Shiites and Sunnis were important factors behind the attack, Marzieh said.
On July 15, two bomb blasts in front of the Zahedan Grand Mosque in Iran's southeastern province of Sistan and Balouchestan killed at least 27 people and injured over 270 more.
The Pakistan-based Jundollah terrorist group, directly sponsored and supported by Washington, claimed responsibility for the attacks.
Jundollah is responsible for several terrorist operations which have killed tens of citizens, officials and security forces in southeastern Iran.
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