Iran's supreme leader Ayatollah Ali Khamenei on Monday called the USA the "source" of instability in the Middle East and said it was responsible for the creation of the Islamic State terror group.
Thousands packed Tehran's streets on Friday to mourn the victims of two suicide bomb and gun attacks, and joined their supreme leader in accusing regional rival Saudi Arabia of involvement in the assaults.
Iranian lawmakers said the intelligence minister had assured them that "all Islamic state elements have been eliminated" in the country.
Seven suspects have been arrested in Iran accused of supporting the dual attacks claimed by Islamic State that killed 17 people in Tehran, state TV is reporting.More news: Trump offers to help resolve Gulf crisis, UAE tightens squeeze on Qatar
Two other terrorists went to the mausoleum of Ayatollah Ruhollah Khomeini, the late founder of the Islamic Republic, and clashed with security forces on the way to hit the mausoleum itself. IS claimed responsibility for the assaults, and threatened more against Iran's Shiite majority.
During the procession through parliament, the heads of Iran's executive, legislative and judiciary branches all paid their respects, including President Hassan Rouhani, Larijani and the head of the judiciary, Sadeq Larijani Amoli.
At least 41 ISIS members have been identified and arrested by Iran's intelligence forces in separate operations in Kermanshah, Kurdistan, West Azerbaijan and Tehran provinces.
"The mastermind who controlled the team. who had fled outside the country. paid the price for his crimes, with the cooperation of intelligence services of allied countries", Alavi told state television, without providing further details. The Saudis recently hosted US President Donald Trump in Riyadh, where the American leader called on Saudi Arabia and other Arab nations to "drive out the terrorists and extremists" from the region.
This is especially concerning since American Senators described Iran as the main supporter of terrorism, and the recent Tehran attacks proved Iran is tasting its own medicine. He further said Washington has showed that it is the global ISIL.