At the funerals, Iranian Intelligence Minister Seyed Mahmoud Alavi said the gunmen who opened fire on the parade had been killed and a number of their accomplices had been arrested, Iran's semi-official Fars news agency reported.
When asked whether that meant Trump would be willing to sit down with Iran's ayatollah, Pompeo replied, "The president said he'll talk with anyone if we can have a constructive conversation".
Ahvaz is home to a large and restive Sunni Arab population whose activists have pressed for separation from overwhelmingly Shiite Iran, but Hassan Salami, acting commander of the Revolutionary Guards, said at a funeral for one of the victims that Iran would "take revenge" against the US and its allies. "And I am hopeful that cooler, wiser heads will prevail", Mattis said.
The five people who carried out the September 22 shooting in Ahvaz city, killing Revolutionary Guards and civilians including a child, were members of "separatist groups backed by some Arab nations", the Intelligence Ministry said in a statement published by the state-run Iranian Students News Agency.
The coffins, wrapped in flags, were carried by mourners.
Iran's Intelligence Ministry said some 22 people had been arrested in connection with the attack.
Arch-rivals Saudi Arabia and Iran, both oil super-powers, are waging a war for influence across the Middle East, backing opposite sides in conflicts in Syria, Yemen, Iraq and Lebanon.
The ministry said "weapons, exclusive material and communication equipment were seized" from the people involved in the attack. The Arab countries of the Gulf are smaller and weaker than Iran, and have talked themselves into the paranoid conviction that Iran intends to destroy them, perhaps even to replace Sunni with Shia Islam.
Jeremy Corbyn says Britain 'could well be looking towards a general election'
Mr Watson told The Observer: "Jeremy and I were elected in 2015 to give the Labour Party back to its members". We are not happy with it and we would vote against it.
The former New York Mayor told an Iranian opposition group that United States sanctions on Iran are leading to economic pain that could lead to a "successful revolution".
'You have seen our revenge before.
The parade in Ahvaz - the capital of the south-western border province of Khuzestan - marked the anniversary of the start of Iran's 1980-88 war with Iraq. "You will see that our response will be crushing and devastating and you will regret what you have done", he said, according to Reuters.
As he was about to depart to New York, Rouhani squarely blamed the USA for facilitating the attack by backing the Gulf states that provide continuous support to the militant groups aiming to thwart the Iranian government.
Before departing for NY to attend the United Nations General Assembly, Iranian President Hassan Rouhani on Sunday accused the US of providing support to the attackers.
"He can blame us all he wants".
Ayatollah Ali Khamenei, Iran's supreme leader, said on Monday that the attack was carried out by terrorists paid by Saudi Arabia and the UAE, Iran's regional rivals. He linked the attackers to the United States, Saudi Arabia and the UAE.
It is, however, highly unlikely the Guards will strike any of its foes directly and risk setting off a regional conflict.
The attack was then claimed by another Ahvazi group, the Arab Struggle Movement for the Liberation of Ahwaz, and the Islamic State group also claimed involvement.