Number of casualties unclear as of now.Attackers have opened fire at the Iranian parliament and Ayatollah Khomeini's mausoleum in the capital, Tehran, causing a number of casualties.
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At the mausoleum several people were injured, and at least one suicide bomber died.
The so-called Islamic State group (IS) has claimed it carried out the attacks.
Would be interesting to ascertain whether the perpetrators are radicalized Sunnis, or converts from Shia branch of Islam. I guess it won't be clear for some time.