Seyed Movahedi and Fazel Matroudi, among 25 others, lost their lives in the bomb attack at Imam Sadiq (AS) Mosque in Kuwait City.
The bomb blast also injured 200 other worshippers, including five Iranians, media reported.
The Takfiri ISIL terrorist group has claimed responsibility for the attack.
ISIL has claimed responsibility for similar bomb attacks in Saudi Arabia and Yemen over the past weeks.
On May 22, a blast in the al-Qudaih Village in the Qatif region of Saudi Arabia’s Eastern Province killed 21 worshipers, including two children.
Earlier in March, at least 142 people were killed and over 350 others wounded in three bomb attacks targeting Friday prayers at mosques in the Yemeni capital, Sana’a.