(CNN) A video circulating on the ISIS-affiliated Amaq News Agency claims to show three of the four assailants accused of carrying out a deadly terrorist attack on an Iranian military parade.

CNN cannot verify the authenticity of the video, which Amaq said it "obtained" and published on Sunday, a day after the attack that killed 29 people and wounded 70 others.

The video shows three men in military fatigues speaking to a camera inside a vehicle. None of them directly mention Saturday's attack in Ahvaz, Iran, nor do they say they're acting on behalf of ISIS, which has claimed responsibility for the attack but has not provided evidence to support that claim.

Two of the men in the video speak Arabic and the third speaks Farsi. They offer short "goodbyes," thank God and call on those watching the footage to pray for them.

"God willing, I'm going to die," says the man who speaks Farsi, claiming a "very strong guerrilla operation" will destroy the Islamic Revolutionary Guard Corps.

A soldier injured in the attack is treated at the scene in the southern Iranian city of Ahvaz.

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