Moment gunmen entered Iran parliament
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Iran parliament attack: Moment gunmen burst into Tehran building

CCTV footage shows the moment a deadly terror attack began in Tehran on Wednesday morning.

Thirteen people were killed when gunmen and suicide bombers targeted the Iranian parliament and the mausoleum of Islamic Republic founder Ayatollah Khomeini in a twin assault that lasted several hours.

Iran says the attackers, all of whom were killed, were Iranians who had joined IS.

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