"Following up and quickly investigating this matter is of utmost importance," Raeisi said, adding that regular updates on the situation should be provided to ease the families' worries, Tasnim News Agency reported.
Raeisi emphasized that the Ministry of Health, Ministry of Intelligence, and other relevant agencies must work with the interior minister to address the issue. He also stressed that any dissemination of information must go through the Interior Ministry.
The cause and number of cases in the poisoning of schoolgirls in several Iranian cities remain unknown.