At least 12 people were killed and 38 others injured in two separate terrorist attacks on parliament building and mausoleum of Ayatullah Khomeini in Tehran on Wednesday.

Iran's state TV reported that the attacks began midmorning when assailants armed with Kalashnikov rifles stormed the parliament building. One of the attackers later blew himself up inside, where a session was in progress.

The Iranian Intelligence Ministry said security forces arrested a terrorist team planning a third attack.

Deputy Interior Minister Mohammad Hossein Zolfaghari told Iran's state TV the apparently male attackers wore women's attire.

Another four terrorists attacked the shrine of Imam Khomeini killing two security guards and injuring many others. 

Iranian media reported that four attackers inside the parliament building had been killed by security forces.

Islamic State group has claimed responsibility for the attack.

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