Iran is vowing quick revenge for a pair of terror attacks that struck Tehran on Wednesday morning. First, four gunmen, some dressed as women, burst into Iran's parliament on Wednesday morning, armed with grenades and explosive vests. 12 people were killed after two vests had been detonated. After a five hour standoff, the four attackers were killed by police. A second, almost simultaneous and highly symbolic attack occurred a few miles away, when a suicide bomber exploded his vest near the mausoleum of Grand Ayatollah Ruhollah Khomeini, who was the founder of Iran's Islamic Republic after leading the 1979 revolution. One person was killed, another wounded. Five people believed to be planning a third attack were arrested. The so-called Islamic State (IS or ISIS or ISIL or Daesh) claimed credit for the terror acts, and backed up their claim during the attack by posting video from inside the parliament building. Iran later confirmed the claim, by saying that all the attackers were Iranian nationals who had joined ISIS. BBC
This attack will act as a huge shock to Iranians, who imagined that they were somehow immune from the jihadist attacks that affect other countries in the region. ISIS and al-Qaeda had not been very successful in Iran because it's a mostly Shia Muslim country, making it difficult for the Sunni jihadist groups to recruit suicide bombers. However, there is a small community of Sunni Muslims in Iran, and it appears that ISIS has been able to infiltrate that group.
Iran's Islamic Revolutionary Guard Corps (IRGC) blamed the attack on Saudi Arabia and America:
"World public opinion, especially in Iran, sees the fact that this terrorist act was perpetrated soon after the meeting of the US president with the heads of one of the reactionary regional states that has always supported ... terrorists as to be very meaningful." CNN
Iranian officials point out that hours before the attack, Saudi Arabia's foreign minister Adel al-Jubeir said that Iran must be punished for alleged interference in the region and support for terrorist organizations.
The Saudis are likely to be infuriated by the implication that they were involved, and the terror attack is likely to worsen the already high tensions in the Gulf region, as well as the vitriolic statements that Iran and Saudi Arabia make about each other.... Fars News (Tehran) and AP