According to Fars, the letter contained a warning by which "the biological attack will hit whoever is hostile to Israel."
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The report further adds that with the receipt of the letter, the Iranians updated relevant authorities, including a specialist physician and representatives of the committee dealing with biological threats.
Fars claims that professionals took the envelope away in order to reduce risk of virus spread and in order to thoroughly investigate the content of the envelope.
Arab-language Iranian television channel Al-Alam reported that as of the time of the report's release, there is no information regarding people who have contracted any virus within the Iranian representatives' office.