The ministry released the photographs and first names of the five attackers without mentioning their family names or specifying the regions they hail from.
In an earlier tweet, Mr Zarif appeared to blame its regional rivals for the attack, saying: "Terror-sponsoring despots threaten to bring the fight to our homeland". Iran said today that gunmen and bombers who attacked Tehran were Iranian members of Islamic State who had fought in the militants' strongholds in Syria and Iraq - deepening the regional ramifications of the assaults.
While Trump expressed sympathy for the victims he levelled a barbed warning at Iran, after the USA leader took a hard line on the nation during a recent Middle East visit.
Intelligence Minister Mahmoud Alavi has said Iran identified several jihadists, where they meet and where they hide. He did not elaborate.
Iranian security officials have not said who they suspect is behind the attacks. Commuters in the Iranian capital noticed more police than usual on the streets as dawn broke.
Reza Seifollhai, the deputy head of Iran's National Security Council, told state TV late Wednesday that the attackers were Iranians who had joined IS. "We can not yet make a judgement and therefore we are studying the subject", Iran's intelligence minister Mahmoud Alavi said.
The state-run IRNA news agency reported Thursday that the death toll had risen to 17. NPR's Michele Kelemen notes that the State Department condemned the attack and wrote that "the depravity of terrorism has no place in a peaceful, civilized world".
"We grieve and pray for the innocent victims of the terrorist attacks in Iran, and for the Iranian people, who are going through such challenging times", the statement said.
Congress MP Palvai Govardhan Reddy expired
BJP state president K Laxman said Reddy was active in the Telangana movement and his death was a loss to the state. Palvai Govardhan Reddy died of a massive heart attack in Himachal Pradesh's Kullu town on Friday.
The forces serving in the Intelligence Ministry and other Iranian security and military organizations would very soon teach an unforgettable lesson to the "mercenary terrorists and their sponsors", Alawi said in a message on Wednesday, after two terrorist attacks in Tehran claimed 12 lives and wounded more than 40 others.
The comments sparked anger from Iranians on social media, who recalled the vigils in Tehran that followed the September 11 attacks.
Larijani also criticized a Wednesday decision by the U.S. Senate to move forward on a new set of sanctions against Iran, including its elite Revolutionary Guards, a move that came on the same day as the Tehran attacks.
The country's powerful Revolutionary Guards vowed revenge and claimed the United States and Saudi Arabia were "involved".
ISIS, which adheres to a puritanical strain of Sunni Islam, considers Shias heretics and has carried out numerous attacks against Shia civilians, in Iraq in particular.
The jihadist group claimed responsibility for Wednesday's attacks that killed 17 people. "Instead, we'll work so that the battle is for them in Iran", the prince said in an interview with an Arab channel.
"Such acts will have no other result than to reinforce hatred for the USA government and its agents in the region, like the Saudi (government)", Ayatollah Ali Khamenei wrote in a message of condolence to the families of the dead.
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