A group called
Islamic Jihad Organization, which has been linked to
Iran and possibly
Hezbollah, claimed responsibility; Islamic Jihad also released surveillance footage they took of the embassy before the blast. Messages intercepted by the American
National Security Agency revealed Iranian knowledge of the impending attack, as well as the complicity of Hezbollah operative
Imad Mughniyah. A number of sources report on Hezbollah involvement with the assistance of
Syria. Hezbollah denies these claims. In 1999, the Argentine government issued an arrest warrant for Imad Mughniyah in connection with this attack and the 1994 AMIA bombing in Buenos Aires, which killed 85. It is suspected that the two attacks are linked. In 2023, the United States sanctioned Hezbollah operative
Amer Mohamed Akil Rada, who was active in Latin America for over a decade, for his reported role in this attack and the
1994 AMIA bombing. In April 2024, Argentina's second highest court ruled that the Iranian government was responsible for the bombing, and that it was carried out in retaliation for Argentina reneging on agreements to transfer nuclear material to Iran. The ruling also characterized Iran as a terrorist state. ==Aftermath==