Iranian Foreign Minister Javad Zarif says the attacks will strengthen's Iranian people's will to fight terrorism.
Statement by Amnesty International on the attacks in Tehran:
https://www.amnesty.org/en/latest/news/2017/06/iran-suicide-and-gun-attack-at-shrine-and-parliament-a-horrific-assault-on-human-life/
How did the attackers gain access to the parliament? Our Persian Service Radio Farda spoke with Ehsan Mehrabi, who was a parliamentary reporter in Iran and is well familiar with the parliament complex and its points of entrance. He says that the gunmen, approaching from the street opened fire at the entrance of the administrative building and as they managed to enter, there were basically inside. More here:
https://en.radiofarda.com/a/iran-parliament-attack/28533681.html