The group, which has struck before in Iran, has a long history of division with the country.
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The Islamic State, whose affiliate in Afghanistan, ISIS-Khorasan, has repeatedly threatened Iran over what it says is its polytheism and apostasy, has claimed responsibility for
several previous attacks on Iran.
The most recent came in October 2022, when a gunman
killed 13 people at a shrine in the city of Shiraz. An Islamic State statement claiming responsibility for that attack said it had aimed to kill Shiites — framing the shootings as the continuation of an ancient clash between Sunnis and Shiites, whose religious schism goes back to a seventh-century dispute over the rightful heir to the Prophet Muhammad.
Thursday’s statement used the same derogatory term for Shiites, roughly translated as “rejectionists” or “refusal infidels,” as in the 2022 statement.