Mehr news agency reported that the systems were activated in several parts of the capital.
Air defence systems were activated in parts of Tehran on Thursday evening amid reports of hostile aerial activity, Iranian state media said in the first such reports since a ceasefire began.
The IRNA state news agency said the "sound of air defence firing" was heard in western Tehran, while the Mehr news agency reported that the systems were activated in several parts of the capital to counter "hostile targets", without elaborating further.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
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