The Iranian Intelligence Ministry on Thursday said authorities have arrested 35 people in relation to the January 3 attacks in the southeastern city of Kerman.
The ministry said it had identified one of the two suicide bombers as a national of Tajikistan, who entered Iran illegally on December 19, 2023.
According to the ministry, more information will be released at a later date about the second suicide bomber.
The ministry added that the arrests had been carried out in several Iranian provinces.
The Islamic State had also claimed responsibility on January 4 for the attack that killed nearly 100 people and wounded 284 at a memorial for top commander Qassem Soleimani.
Tehran had vowed revenge for the bloodiest attack so far since the 1979 Islamic Revolution.
