Iran weighs whether Saudi Arabia was behind attack
Iran's military has vowed to take action against the perpetrators of Wednesday's double attacks in Tehran, which killed at least 13 people.
The Islamic State of Iraq and the Levant (ISIL, also known as ISIL) says it was responsible and released a video purporting to show gunmen inside the parliament building.
But the Revolutionary Guard has questioned whether Saudi Arabia played a role, with officials recently saying that the kingdom had threatened to “take the war inside Iran”.
Al Jazeera's Rob Matheson reports.
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