The ministry says its forces confiscated three Kalashnikov rifles, night vision goggles, three suicide belts, three phones for remote detonation, a large amount of bullets and other technical tools for making bombs, in a statement issued Saturday.
The report did not elaborate on the number of people detained, or where the arrests took place.
Five attackers linked to IS stormed Iran's parliament and a shrine to revolutionary leader Ayatollah Ruhollah Khomeini this month, killing at least 17 people and wounding more than 50.
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