The industrial disaster in north-eastern Iran is the most deadly in the Islamic Republic for decades.
Iran's defense minister was responding to Saudi comments about the "battle" for influence in the Middle East.
The Syrian government says it destroyed its stockpiles in 2014.
New footage emerged of Iran's Qaher F-33 stealth fighter jet, which Western critics said was further away from its first flight than Tehran claimed.
The organization is seen as a counterweight to Western alliances, cooperating on political and economic affairs.
The evacuation of civilians in four besieged Syrian towns is also part of the deal.
Experts say a Raisi victory in the presidential elections could increase already simmering tensions between the Islamic Republic and the West.
The minister took a shot at the Islamic Republic while commenting on the murder of a top Hamas member.
"What are Americans doing in the Persian Gulf? They had better get out of this region and not cause nuisance for the regional countries," Iran's Defense Minister Hossein Dehghan asked.
Iran's foreign ministry claims the companies violated human rights and cooperate with Israel in terrorizing Palestinians.
In February, the Trump administration imposed sanctions on 25 individuals and entities in Iran, which it said were just "initial steps" in its effort to counteract what it sees as provocations.
Iran's Supreme Leader Ayatollah Ali Khamenei criticized Iranian President Hassan Rouhani's economic policies, calling for greater self-sufficiency for the country.
Commander says American actions "can have irreversible consequences" after Strait of Hormuz incident.
The president put his name to a building built by family of Ziya Mammadov, the country’s transport minister.
Former president joins the service that the government blocked following protests in 2009.
'The Nights of Zayandeh-rood' documents the life a father and daughter through the 1979 revolution.
Asghar Farhadi did not attend the Oscars in protest at President Trump’s immigration ban.