Iran's Intelligence Ministry confirmed Thursday that at least five of the eight male attackers had fought for Islamic State.
A ministry statement issued Thursday said the men had left Iran to fight for the extremist group in Mosul, Iraq, as well as Raqqa, Syria - the group's de facto capital.
IS claimed responsibility for shootings and explosions in Tehran on Wednesday that targeted the Iranian Parliament and the shrine of former Supreme Leader Ruhollah Khomeini. It identified the men only by their first names, .
The officials say the woman who commanded the terrorist attack is from Iran's southern regions and the rest are from the country's western regions.
Iran denounced Donald Trump's reaction to deadly Islamic State group attacks in Tehran as "repugnant" on Thursday after the U.S. president warned the nation is reaping what it sows. The statement concludes: "We underscore that states that sponsor terrorism risk falling victim to the evil they promote".
Javad Zarif, who is on a visit to Turkey, also criticized a vote by the U.S. Senate soon after the attack to extend sanctions on Iran in a tweet.
"Iranian people reject such USA claims of friendship", Zarif tweeted.
North Korea launches fourth missile test in a month
He warned that North Korea could only face further global isolation and more economic difficulties. Seoul , Tokyo and Washington were analysing the launches for further information, officials said.
That was condemned by Iranian Foreign Minister Mohammad Javad Zarif, who tweeted: "Repugnant WH (White House) statement... as Iranians counter terror backed by U.S. clients".
"I am sure Persian Gulf Arab countries are behind this", said Nahid Ghanbari, a 21-year-old university student studying accounting. The sad thing is that they probably won't - people in the West have largely been programmed to see Iran as an enemy and to ignore the fact that it, as much as the West, has been near the top of the list of enemies for Daesh, Al Qaeda and their kin.
The Lebanese militant group Hezbollah has condemned the twin extremist attacks in Tehran, describing them as part of an "international, destructive plan" backed by various regional governments.
What is often obscured by commentators is that much of the present violence in the Middle East is political, not religious, even though religious labels are used as a shorthand for the competing blocs (in much the same way as "Catholic" and "Protestant" were used during the Troubles in Northern Ireland). One eventually exploded a suicide vest while the others were killed by security forces.
The video, circulated online, shows a gunman and a bloody, lifeless body of a man lying on the ground next to a desk.
Six terrorists were killed on the scene and a woman was wounded and arrested. The revered shrine was not damaged.
According to reports, Reza Seifollhai, the deputy head of Iran's National Security Council, said on state television that the assailants were Iranian Isis recruits. He did not elaborate.



Comments