Wednesday's attack on Tehran ended after Iranian security guards and the Iranian Revolutionary Guard Corps (IRGC) killed four of the militants.
Armed men launched two attacks in Iran's capital on Wednesday morning, killing a guard at the parliament and wounding several people in the Mausoleum of Ayatollah Khomeini in southern Tehran, state media reported.
ISIS claimed responsibility for the terror attacks in Tehran.
The attackers struck at Iran's most potent symbols: its parliament complex in Tehran and the mausoleum of Ayatollah Ruhollah Khomeini who led the 1979 Islamic revolution. President Barack Obama removed the fourth country, Cuba, from the list during his tenure, despite the Castro regime's continued support for the Revolutionary Armed Forces of Colombia (FARC) and Hezbollah.
Iran initially said a dozen victims died; it's unclear whether the toll announced Thursday includes the five attackers.
The Revolutionary Guards' statement after the attacks overtly connected them with Donald Trump's visit to the Middle East, during which the U.S. president met with his Saudi and Israeli counterparts and decried Iran for supposedly sponsoring terrorism and extremism - basically putting the country back in the George W. Bush-era "Axis of Evil" hall of shame.
The assaults killed at least 12 people and wounded more than 40.
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The week OPEC agreed to extend oil-production cuts for another nine months, USA crude exports hit a new record. Forecasters had predicted a decline in inventories.
Also, the attack comes against a backdrop of regional tension, with Arab Gulf countries pushing for a more forceful isolation of Iran.
Both attacks were claimed by Islamic State (IS, formerly ISIS/ISIL), the jihadist organization based in Iraq and Syria.
It described them as "long affiliated with the Wahhabi", an ultraconservative form of Sunni Islam practised in Saudi Arabia.
Maryam Rajavi, President-elect of the National Council of Resistance of Iran's (NCRI) condemned the attack, stating: "ISIS's conduct clearly benefits the Iranian regime's Supreme Leader Khamenei, who wholeheartedly welcomes it as an opportunity to overcome his regime's regional and worldwide impasse and isolation". Iran is a majority-Shiite nation, and the Islamic State is a Sunni group that often targets Shiite Muslims. He also said the USA was grieving and praying for the victims of the attacks.
Trump tweeted that "states that sponsor terrorism risk falling victim to the evil they promote".
Zarif tweeted: "The Iranian people reject such USA claims". Foreign minister Mohammad Javad Zarif called the White House comments "repugnant" and accused the United States of supporting terror.
Meanwhile, President Trump's statement on the attack has prompted criticism in Iran.
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