A security guard was killed when four gunmen burst into Tehran's parliament complex, while a gardener was reported dead when several armed assailants entered the grounds of Khomeini's mausoleum in the south of the city, according to the ISNA news agency.
The two attacks carried out by gunmen and suicide bombers at Ayatollah Khomeini's shrine and the Iranian parliament in Tehran on June 7, 2017, were despicable acts of violence, Human Rights Watch said today.
"In the first minutes of the attack, the Islamic Revolution Guards Corps forces entered the scene and gained control of the floor and main area of the parliament building", Zolfaqari said. The attackers were killed in an hours-long stand-off with security forces.
It was not clear whether the shrine attackers were women, as earlier reported, or just wearing female clothing.
According to Reuters, at least seven people were killed while Al-Jazeera put the figure at 12.
State broadcaster IRIB reported that the shooting incident at the Iranian parliament is over and all four assailants are now dead. Saudi Arabia and its Sunni allies, including Bahrain and the United Arab Emirates, have expressed growing anger at Qatar's relatively cordial relations with Shiite Iran. Syria's Foreign Ministry also condemned the attacks, which it said were backed by various governments that it did not specify. "They are too small to affect the will of the Iranian nation and its officials", state TV quoted him saying.
"This terrorist attack happened only a week after the meeting between the US President [Donald Trump] and the [Saudi] backward leaders who support terrorists", a statement said. "We will remain, God willing".
The last major attack in Iran was in 2010 when a Sunni extremist group carried out a suicide attack against a mosque in Sistan-Baluchistan killing 39 people.
The Revolutionary Guards also said in a statement published on state media that it "has proved in the past that it will take revenge for all innocent blood shed" in Iran.
The rare attacks were the first claimed by the hardline Sunni Muslim militant group inside in the tightly controlled Shi'ite Muslim country.
Two other terrorists at the mausoleum, one of them a woman, were arrested.
A picture from semi-official Fars news agency shows a man lowering a young boy from a window of the parliament building onto the street as another man holding a gun watches over them from another window. Targeted by IS Jihadist groups have clashed frequently with security forces along Iran's borders with Iraq and Afghanistan, but the country has largely escaped attacks within its urban centres. Iranian security officials have not said who they suspect is behind the attacks, though state media has referred to the attackers as "terrorists".