At least 29 people are killed and dozens wounded in an attack in the southwestern Khuzestan province on September 22 targeting an army parade commemorating the anniversary of the 1980-1988 Iran-Iraq war. (Photo: Morteza Jaberian / AFP / ISNA)

In the video, three men in a vehicle, dressed in Iran's Islamic Revolutionary Guard Corps (IRGC) uniforms, claim they are on their way to attack an Iranian military parade. One of them speaks in Farsi, while the other two speak about jihad in Arabic.

The same day, the IRGC accused the Persian Gulf Arab states of supporting the attack and said it will carry out “a deadly and unforgettable revenge”, adding that it has full knowledge of the perpetrators’ whereabouts. US Ambassador to the UN Nikki Haley said the US condemns the attacks and isn’t attempting to effect regime change in Iran or any other country.