Bahrain

On 30 September 2015, Bahraini security forces discovered a large bomb-making factory in Nuwaidrat and arrested a number of suspects linked to the Iranian Revolutionary Guards. The next day, 1 October, Bahrain recalled its ambassador to Iran and asked the Iranian acting charge d’affaires to leave the kingdom within 72 hours after he was declared persona non-grata. Bahrain's decision to recall its ambassador came "in light of continued Iranian meddling in the affairs of the kingdom of Bahrain in order to create sectarian strife and to impose hegemony and control. On 6 January 2016, Bahrain said it had dismantled a terrorist cell allegedly linked to the Revolutionary Guards and Hezbollah. The Bahraini interior ministry said the cell was planning to carry out a “series of dangerous bombings” on the kingdom, and that many members were arrested including the group's leaders, 33-year-old twins Ali and Mohammed Fakhrawi.

India

In July 2012, The Times of India reported that New Delhi police had concluded that terrorists belonging to a branch of Iran's military, the Iranian Revolutionary Guards, were responsible for an attack on 13 February 2012, during which a bomb explosion targeted an Israeli diplomat in New Delhi, India, wounding one embassy staff member, a local employee, and two passers-by. According to the report, the Iranian Revolutionary Guards may have planned other attacks on Israeli targets around the world as well.

Israel

Iran does not recognize Israel as a state, and provides support for Hamas, Hezbollah and Palestinian Islamic Jihad.

Hamas

Iran supplies political support and weapons to Hamas, an organization classified by Israel, the United States, Canada, the European Union, Egypt, Australia and Japan as a terrorist organization. Mahmoud Abbas, President of the Palestinian National Authority, has said "Hamas is funded by Iran. It claims it is financed by donations, but the donations are nothing like what it receives from Iran". From 2000 to 2004, Hamas was responsible for killing nearly 400 Israelis and wounding more than 2,000 in 425 attacks, according to the Israeli Ministry of Foreign Affairs. From 2001 through May 2008, Hamas launched more than 3,000 Qassam rockets and 2,500 mortar attacks into Israel.

Hezbollah

Hezbollah was founded in the early 1980s as part of an Iranian effort to aggregate a variety of militant Lebanese Shia groups into a unified organization. It acts as a proxy for Iran in the ongoing Iran–Israel proxy conflict. Its leaders were followers of Ayatollah Khomeini, and its forces were trained and organized by a contingent of 1,500 Revolutionary Guards that arrived from Iran with permission from the Syrian government, which was in occupation of Lebanon at the time. Since 2012, Hezbollah has helped the Syrian government during the Syrian civil war in its fight against the Syrian opposition, which Hezbollah has described as a Zionist plot and a "Wahhabi-Zionist conspiracy" to destroy its alliance with Assad against Israel.

Islamic Jihad is widely believed to be a nom de guerre of the Lebanese Islamist political movement and social service agency Hezbollah, which was founded in 1982 with many millions of dollars of aid and considerable training and logistical support from the Islamic Republic. Many believe the group promotes the Iranian agenda and that its goal is to overthrow the moderate governments in the area and create Islamic Republics based on that of Iran as well as the destruction of Israel. Iran has supplied the militant organization Hezbollah with substantial amounts of financial, training, weapons (including long range rockets), explosives, political, diplomatic, and organizational aid while persuading Hezbolla to take an action against Israel. Hezbollah's 1985 manifesto listed its four main goals as "Israel's final departure from Lebanon as a prelude to its final obliteration". According to reports released in February 2010, Hezbollah received $400 million from Iran.

Shi'ite Militias in Iraq

The United States State Department states that weapons are smuggled into Iraq and used to arm Iran's allies among the Shiite militias, including those of the anti-American cleric Muqtada al-Sadr and his Mahdi army.During his address to the United States Congress on September 11, 2007, Commanding Officer for the United States forces in Iraq, General David Petraeus noted that the multinational forces in Iraq found that Iran's Quds force had provided training, equipment, funding, and direction to Shi'ite militia groups. “When we captured the leaders of these so-called special groups … and the deputy commander of a Lebanese Hezbollah department that was created to support their efforts in Iraq, we’ve learned a great deal about how Iran has, in fact, supported these elements and how those elements have carried out violent acts against our forces, Iraqi forces and innocent civilians.”
In 2015, Michael Weiss and Michael Pregent accused the Popular Mobilization Units, an organization of 40 mainly-Shi'ite militias backed by Iran, of committing extensive atrocities against Sunni civilians in the course of their war against the Islamic State of Iraq and the Levant, including "burning people alive in their houses, playing soccer with severed human heads, and ethnically cleansing and razing whole villages to the ground." Weiss and Pregent even suggested that "Iran's Shi'ite militias aren't a whole lot better than the Islamic State.