LONDON — The deputy head of Iran’s Revolutionary Guards warned US and Israeli leaders on Monday to expect a “devastating” response from Tehran, accusing them of involvement in an attack on a military parade in the city of Ahvaz.

“You have seen our revenge before ... You will see that our response will be crushing and devastating and you will regret what you have done,” Hossein Salami said in a speech before the funeral of the victims broadcast live on the state television.

Four assailants fired on a viewing stand in Ahvaz where Iranian officials had gathered to watch an annual event marking the start of Iran’s 1980-88 war with Iraq.

Soldiers crawled on the street to avoid bullets.

Intelligence Minister Mahmoud Alavi said a large network of suspects had already been arrested in connection with the attack, the judiciary’s news agency Mizan reported. . He did not elaborate.

Daesh’s Amaq agency posted a video of three men in a vehicle who it said were on their way to carry out the attack.

A man wearing a baseball cap emblazoned with what appears to be a Revolutionary Guard logo discussed the impending attack in Farsi in the video.

The Islamic Revolutionary Guards Corps (IRGC) was set up after 1979 to protect the Shiite clerical ruling system and revolutionary values.

It answers to Ali Khamenei. The IRGC has an estimated 125,000-strong military with army, navy and air units.

The Guards could put on a show of strength by firing missiles at opposition groups operating in Iraq or Syria that may be linked to the militants who staged the attack. — Reuters