The Bureau of Counterterrorism and Countering Violent Extremism
https://2009-2017.state.gov/j/ct/rls/crt/c14818.htm
Extract
State Sponsors of Terrorism Overview
Iran
Iran remained the most active state sponsor of terrorism in 2004. Its Islamic Revolutionary Guard Corps and Ministry of Intelligence and Security were involved in the planning and support of terrorist acts and continued to exhort a variety of groups to use terrorism in pursuit of their goals.
Iran continued to be unwilling to bring to justice senior al-Qa'ida members it detained in 2003. Iran has refused to identify publicly these senior members in its custody on "security grounds." Iran has also resisted numerous calls to transfer custody of its al-Qa'ida detainees to their countries of origin or third countries for interrogation and/ or trial. Iranian judiciary officials claimed to have tried and convicted some Iranian supporters of al-Qa'ida during 2004, but refused to provide details. Iran also continued to fail to control the activities of some al Qa'ida members who fled to Iran following the fall of the Taliban regime in Afghanistan.
During 2004, Iran maintained a high-profile role in encouraging anti-Israeli terrorist activity, both rhetorically and operationally. Supreme Leader Khamenei praised Palestinian terrorist operations, and Iran provided Lebanese Hizballah and Palestinian terrorist groups -- notably HAMAS, the Palestinian Islamic Jihad, the al-Aqsa Martyrs Brigades, and the Popular Front for the Liberation of Palestine-General Command -- with funding, safe haven, training, and weapons. Iran provided an unmanned aerial vehicle that Lebanese Hizballah sent into Israeli airspace on November 7, 2004.
Iran pursued a variety of policies in Iraq during 2004, some of which appeared to be inconsistent with Iran's stated objectives regarding stability in Iraq as well as those of the Iraqi Interim Government (IIG) and the Coalition. Senior IIG officials have publicly expressed concern over Iranian interference in Iraq, and there were reports that Iran provided funding, safe transit, and arms to insurgent elements, including Muqtada al-Sadr's forces.