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Iran's parliament and Khomeini mausoleum attacked by gunmen Iran's parliament and Khomeini mausoleum attacked
(about 1 hour later)
Attackers have opened fire at the Iranian parliament and Ayatollah Khomeini's mausoleum in the capital, Tehran, causing a number of casualties. Twin attacks on the Iranian parliament and Ayatollah Khomeini's mausoleum in the capital, Tehran, have caused a number of deaths and injuries.
Heavy gunfire could be heard on videos filmed from outside parliament, and there are reports that a security guard has been killed. The assault on the parliament building may be ongoing, with conflicting reports of a hostage situation. A suicide bomber died at the mausoleum.
At the mausoleum several people were injured, and at least one suicide bomber died. Iranian officials say they have foiled a third attack.
The so-called Islamic State group (IS) has claimed it carried out the attacks. The so-called Islamic State group (IS) has claimed it carried out the attacks, which would be a first in Iran.
It did not provide any evidence. IS later posted a video which showed what it claims is footage from inside the parliament building.
Reports are coming in of a second suicide bombing at the shrine, dedicated to the founder of the Islamic Republic. Two or three gunmen were also involved in the initial attack there, news agencies reported.
Iran's intelligence ministry said it had foiled a third attack by a "terrorist group" but did not name any organisation.
Latest updatesLatest updates
The situation at the parliament remains confusing, with some reports of a suicide bomber there, and an an ongoing hostage situation - but the BBC cannot confirm these. Gunmen armed with Kalashnikovs broke into the parliament in the morning, killing a security guard, and there are reports of several more deaths. It is unclear whether the situation has been resolved, and images from the scene show a major security operation.
Fars news agency posted new pictures showing shooting around the building. There are unconfirmed reports of a continuing hostage situation, and on video filmed outside parliament heavy gunfire can be heard.
An image showing a man with a gun looking out of the window, initially described as an attacker by Iranian media, actually shows a policeman. MP Mojtaba Zonnour says security forces have the streets near Iran's parliament "under full control" but are still trying to control the situation inside the building, reports Mehr news agency.
But MP Seyyed Hossein Naqavi-Hosseini told the Isna news agency that three gunmen were still in the building, in MPs' offices. At around 10:40 (06:10 GMT) attackers at the mausoleum in southern Tehran, which is dedicated to the Islamic Republic's founder Ayatollah Khomeini, opened fire.
A photo posted by Fars showed people inside the parliament building lowering a child out of a first-floor window to people waiting below. The governor of Tehran said one attacker there had detonated a suicide vest and another had been killed by security forces, state broadcaster Irib reports.
State TV news channel Irinn said seven or eight people had been injured at the parliament by four attackers. Images from the scene showed grenades and magazines for automatic weapons, apparently recovered from the body of an attacker.
The gunmen were carrying Kalashnikovs and one Colt pistol, reports said. There are reports that either one of the attackers was female, or possibly just dressed as a woman.
Irna said one gunman had been arrested. Several members of the public, visiting the shrine, have been injured.
The governor of Tehran said one attacker at the mausoleum had detonated a suicide vest and another had been killed by security forces, state broadcaster Irib reports. Background - by Jenny Norton, BBC Persian
Ali Khalili from the mausoleum's public relations office told the state-run Irna news agency that one of the armed men had blown himself up in front of a bank outside the mausoleum. This is the most serious terrorist violence in Tehran since the turbulent early years after the 1979 Islamic Revolution.
However, Fars reported that the suicide bomber was a woman. Images from the scene showed the remains of the bomber, apparently clad in black clothes. It will come as a huge shock to ordinary Iranians, who have got used to living in a country which is generally far more stable and safe than most of its neighbours.
There are conflicting reports as to whether the remaining attackers have been arrested. Despite Iran's active involvement in fighting IS in both Iraq and Syria, the Sunni group has not so far carried out any attacks inside Iran, and appears to have little support in this predominantly Shia country.
Five people were wounded at the mausoleum, and one person was confirmed dead, the Ilna news agency said, though it was unclear whether this included the bomber. However, in recent months the group has stepped up its Farsi-language propaganda efforts - targeting Iran's restive Sunni minority, and the Iranian intelligence agencies claim to have foiled an number of IS-inspired plots.
Analysis - from BBC Monitoring's Jihadist Media Team
IS has this year released a number of propaganda pieces focused on inciting attacks inside Iran.
An IS documentary-style video in March featured militants who were introduced as Iranian fighters in IS ranks based in Iraq.
Speaking in Farsi, they denounced the Iranian government and the religious establishment, including the country's spiritual leader Ayatollah Ali Khamenei.
By mounting a successful attack, IS could claim a major coup against a traditional foe that other Sunni jihadist groups, including its rival al-Qaeda, have failed to target in the past.