Daesh claimed responsibility for the suicide bombings and gun attacks on parliament and the mausoleum of the Islamic Republic's founder, Ayatollah Ruhollah Khomeini, on Wednesday.
Iran has arrested nearly 50 people in connection with a twin attack on Tehran that killed 17 people last week, officials said, as security forces stepped up efforts to crack down on suspected militants.
"Especially when we see the USA position and the Senate sanctions bill [the same day as the terrorist attacks on Tehran which killed 17 people], all their objectives are revealed", Larijani said, adding "the enemy's strategy is to damage Iran's dignity and busy our authorities with side issues".
Press TV quoted Iran's Intelligence Minister Mahmoud Alavi, as saying in a televised interview on Saturday that the mastermind of the terrorist attack on Iran's Parliament and the shrine of Ayatollah Khomeini on June 7 were killed earlier in the day by the intelligence forces.
Iran accuses Saudi Arabia of funding hardline Sunni militants, including Islamic State, and in the wake of last week's attack pointed the finger at its regional rival.
"The terrorists first went by vehicle to the mausoleum and after dropping two of them off, went to the city centre to attack parliament", the police said.
"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.
Khamenei said Iran had no intention of normalising ties with the United States."The American government is against an independent Iran".
Lawmakers of the Iranian Parliament were briefed on the recent deadly terror attacks in the country by the Iranian Intelligence and Interior Ministers as well as Deputy Commander of the Islamic Revolution Guard Corps (IRGC) Brigadier General Hossein Salami in a closed-door session of Parliament (Majlis) on Sunday.
In Wednesday's attacks no member of the parliament was killed as the attackers were unable to reach the main building.