Any struggle for influence between the Sunni Muslim kingdom and the revolutionary Shi'ite theocracy ought to take place "inside Iran, not in Saudi Arabia", he said without elaborating. "The fact that Islamic State has claimed responsibility proves that they were involved in the brutal attack", said the statement, published by Iranian media. Iran provides ground forces and supports groups fighting against ISIS and other Sunni jihadis in Syria and Iraq.
Minutes after the Parliament attack began, terrorists opened fire at the mausoleum of Khomeini, the founder of the Islamic state.
Jaish al-Adl (or the Army of Justice) is a Sunni militant group that has carried out several attacks on Iranian security forces mainly in Sistan-Baluchestan. The attackers killed seven people and wounded several others, Tasmin said.
Lawmaker Elias Hazrati told state television three attackers, one with a pistol and two with AK-47 assault rifles, raided parliament on Wednesday. Many Iranians, including the powerful Revolutionary Guards, were thus quick to blame the kingdom for the attacks in Tehran, even as IS was claiming responsibility. It described the shrine attackers as "terrorists" and said one carried out a suicide bombing, without providing further details. As part of the July 2015 multinational accord, Iran also regained access to frozen assets held overseas.
Iran's intelligence ministry said it had foiled a third attack by a "terrorist group" but did not name any organisation.
The semi-official Tasnim news agency says medics are treating the guard.
The attack comes at a time of simmering hostility between regional powers resulting from, among other factors, the Syrian civil war and President Donald Trump's numerous public statements declaring his intent to isolate and weaken Iran.
Putin said the attacks underscore the need for deeper global cooperation to fight terrorism and confirmed Moscow's willingness to aid Iran.
Deputy interior minister Mohammad Hossein Zolfaghari told Iran's state TV the apparently male attackers wore women's attire.
Presently the two attacks have been ended and security forces have full control over the current developments and people will be updated accordingly, it said.
Witnesses said that the gunmen fired several shots from the fourth floor of the building at people in the streets below as police snipers took strategic positions on the rooftops. An estimated eight percent of Iran is Sunni Muslim, compared to 89 percent Shiite. A terrorist attack inside of the tightly controlled nation of Iran.
"Iranian officials will be called upon to step up intervention in Iraq (and) Syria big time", he said, adding that Wednesday's attacks will significantly boost IS morale amid battlefield defeats.
Saudi Arabia has long pointed to the absence of IS attacks on Iran as suggestion of Tehran's culpability.