Twenty four people have been killed and 53 wounded in an attack on a military parade in southwestern Iran, the country's official IRNA news agency reported.
Citing 'knowledgeable sources,' IRNA said gunmen dressed in military uniforms opened fire at the event in the southwestern city of Ahvaz on September 22, targeting a stand where Iranian officials were gathered to watch an annual event marking the start of the country's 1980-88 war with Iraq.
'There are a number of nonmilitary victims, including women and children who had come to watch the parade,' IRNA quoted an unnamed official source as saying.
The IRNA report did not say whether members of Iran's elite Islamic Revolutionary Guards Corps (IRGC) were among the fatalities.
But the semiofficial Tasnim news agency said at least eight IRGC members had been killed.
'Three of the terrorists were killed on the spot and a fourth one who was injured died in hospital,' Brigadier General Abolfazl Shekarchi, a senior spokesman for Iran's armed forces, told state television.
IRNA earlier reported that two alleged attackers had been detained.
A video distributed to Iranian media showed soldiers crawling on the ground as gunfire rang out.
There was no immediate claim of responsibility.
Iranian Foreign Minister Mohammad Javad Zarif said on Twitter that the attackers were 'terrorists recruited, trained, armed, and paid by a foreign regime,' but did not elaborate.
He blamed regional countries and their 'U.S. masters' for the attack, adding that Iran would respond 'swiftly and decisively.'
The semiofficial ISNA news agency said an unnamed spokesman for the IRGC had blamed Arab nationalists backed by Saudi Arabia for the attack.
Tensions between traditional rivals Iran and Saudi Arabia have increased in recent years, with the two countries supporting opposite sides in wars in Syria and Yemen and rival political parties in Iraq and Lebanon.
Russian President Vladimir Putin expressed condolences to Iran after the attack, saying Moscow was ready to boost joint efforts in the fight against terrorism, RIA Novosti quoted the Kremlin as saying.
Ahvaz is the capital of Iran's oil-rich Khuzestan Province. The province in the past has seen Arab separatists attack oil pipelines.
Earlier reports described the attackers as "Takfiri gunmen," a term used in the past to describe Sunni Muslim militants.
The semiofficial Fars news agency said two gunmen on a motorcycle wearing khaki uniforms carried out the attack.
Attacks on the military are rare in Iran.
Last year, in the first deadly attack claimed by Islamic State in Tehran, 18 people were killed at the parliament and at the mausoleum of Ayatollah Ruhollah Khomeini, the founder and first leader of the Islamic Republic.
With reporting by AP, AFP, Reuters, and dpa
Copyright (c) 2018. RFE/RL, Inc. Republished with the permission of Radio Free Europe/Radio Liberty, 1201 Connecticut Ave NW, Ste 400, Washington DC 20036