The fallout from Islamic State's attacks in Iran's capital Tehran has continued with revelations that gunmen and bombers were Iranian members of IS who had fought in the militants' strongholds in Syria and Iraq - deepening the regional ramifications of the assaults.
In an apparently coordinated attempt, two terrorist groups attacked mausoleum of the late Imam Khomenini, southern Tehran, and the Iranian Parliament (Majlis) on Wednesday morning killing 17 people and injuring 52 more.
State TV also showed pictures of ammunition, rifles and binoculars laid out next to an Islamic State flag, all, it said, taken from the attackers.
An Iranian state-run news website says 12 people were killed and 42 wounded in attacks on the country's parliament and the shrine of its revolutionary leader.
It then added, "We underscore that states that sponsor terrorism risk falling victim to the evil they promote".
That was condemned by Iranian Foreign Minister Mohammad Javad Zarif, who tweeted: "Repugnant WH (White House) statement.as Iranians counter terror backed by USA clients". "Iranian people reject such United States claims of friendship", Javad Zarif tweeted.
Iranians woke up to a new reality on Thursday after their capital, Tehran, suffered its deadliest militant attack in nearly three decades.
Middle East expert Catherine Shakdam told RT that she is confident there is "more than a connection" between the attacks and Saudi Arabia. After hours of intermittent gunfire, officials said both incidents were over and the attackers were dead. At least 11 people were killed, and one of the attackers blew himself up inside the complex, according to state television.
Parliament operation ended by security forces who killed the terrorists.
On Wednesday, Macron's office issued a statement saying the French president has discussed the Qatar crisis with the Iranian president and in separate telephone conversations with leaders of Saudi Arabia, the UAE, Qatar and Turkey, inviting "all parties to pursue dialogue". Some pointed to comments in May by Saudi Deputy Crown Prince Prince Mohammed bin Salman, the son of the King Salman and the kingdom's defense minister, who said his country would "work so that it becomes a battle for them in Iran and not in Saudi Arabia".
According to the director of the Crisis Research Institute, Mark Almond, it is highly possible IS was, as it claims, behind the attacks in Iran as the group is interested in stirring up a Sunni-Shiite conflict.
"Rightly or wrongly, the perception inside Iran is going to be that Saudi Arabia is behind the attack", said Handjani.
He also suggested that such executions could negatively impact the global sympathy that the attacks have brought for the country and its people. ISIL uses terror to set people against one another, so by that standard, its assault on the Iranian parliament and on visitors to a shrine to Ruhollah Khomeini, the founder of the Islamic Republic, may prove to have been much more successful than its recent strikes in the United Kingdom.
However, knowledge of basic geography and regard for facts are not Trump's strong suits, so it is not surprising that he blamed the ISIS attack on Iran.
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.