ISIS claimed responsibility for yesterday's double bomb attack in Iran. In the announcement made on Telegram account, it was stated that the attack, which killed 84 people, was carried out by the group.

ISIS claimed that the attack was carried out by two militants wearing explosive vests.

Iran has vowed to take "revenge" on those responsible for the attack after the largest and bloodiest attack in the country since the Islamic Revolution in 1979.

Iran's supreme leader Ayatollah Ali Khamenei, the Iranian Revolutionary Guards Corps (IRGC) and Iran's First Vice President Mohammad Mohammad Mohammad Mohammad Mokhbir promised "revenge" for the blasts that killed and wounded dozens of people. 

In the city of Kirman in the southeast of the country, 84 people were killed and around 280 injured in two separate explosions near the cemetery where the grave of former IRGC commander Qassem Soleimani is located.

"The perpetrators of the terrorist attacks in Kirman will be dealt with harshly," Khamenei said.

"The evil and murderous enemies of the Iranian nation have once again caused tragedy and martyred many people," Khamenei said, adding, "The hard-hearted criminals could not tolerate people who respected Qasem Soleimani."  

"They should know that the followers of Qassem Soleimani's enlightened path will not tolerate their infamy and crimes," Khamenei said.

"Qassem Soleimani's soldiers will give them a very strong retaliation," Vice President Muhbir told reporters at the hospital where some of those wounded in the attack are being treated. 

A senior official in US President Joe Biden's administration said the blasts were a "terrorist attack" of the kind carried out by ISIS militants in the past. 

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Iran's Islamic Revolutionary Guard Corps called Wednesday's attack "a cowardly act aimed at creating insecurity and taking revenge against the nation's deep love and devotion to the Islamic Republic of Iran."

The IRGC said the attack "strengthened their resolve to punish the perpetrators in a decisive and just manner."