A massive explosion at an Iranian port possibly linked to missile fuel kills 25, injures some 800

MUSCAT, Oman — A massive explosion and fire rocked a port Saturday in southern Iran purportedly linked to a shipment of a chemical ingredient used to make missile propellant, killing 25 people and injuring around 800 others.

Helicopters and aircraft dumped water from the air on the raging fire through the night into Sunday morning at the Shahid Rajaei port. The explosion occurred just as Iran and the United States met Saturday in Oman for the third round of negotiations over Tehran's rapidly advancing nuclear program.

No one in Iran outright suggested that the explosion came from an attack. However, even Iranian Foreign Minister Abbas Araghchi, who led the talks, on Wednesday acknowledged that ''our security services are on high alert given past instances of attempted sabotage and assassination operations designed to provoke a legitimate response.''

State media offered the casualty figures, saying authorities identified only 10 of the dead, including two women.

Meanwhile, state TV reported the fire was under control and will be fully extinguished later Sunday. It also said activities have resumed at the port, showing footage of containers of a commercial ship being unloaded.

There were few details on what sparked the blaze just outside of Bandar Abbas, causing other containers to reportedly explode.

Private security firm Ambrey says the port received missile fuel chemical in March. It is part of a shipment of ammonium perchlorate from China by two vessels to Iran, first reported in January by the Financial Times. The chemical used to make solid propellant for rockets was going to be used to replenish Iran's missile stocks, which had been depleted by its direct attacks on Israel during the war with Hamas in the Gaza Strip.

In a first reaction Sunday, the spokesman of Iran's defense ministry Gen. Reza Talaeinik, denied reports that missile fuel had been imported through the port.

''No sort of imported and exporting consignment for fuel or military application was (or) is in the site of the port,'' he told state TV by phone. He called foreign reports on the missile fuel baseless.

Ship-tracking data analyzed by The Associated Press put one of the vessels believed to be carrying the chemical in the vicinity in March, as Ambrey said. Iran hasn't acknowledged taking the shipment.

It's unclear why Iran wouldn't have moved the chemicals from the port, particularly after the Beirut port blast in 2020. That explosion, caused by the ignition of hundreds of tons of highly explosive ammonium nitrate, killed more than 200 people and injured more than 6,000 others. However, Israel did target Iranian missile sites where Tehran uses industrial mixers to create solid fuel.

Social media footage of the explosion on Saturday at Shahid Rajaei saw reddish-hued smoke rising from the fire just before the detonation. That suggests a chemical compound being involved in the blast, like in the Beirut explosion.

On Saturday night, the state-run IRNA news agency said that the Customs Administration of Iran blamed a ''stockpile of hazardous goods and chemical materials stored in the port area" for the blast, without elaborating.

An aerial shot released by Iranian media after the blast showed fires burning at multiple locations in the port, with authorities later warning about air pollution from chemicals such as ammonia, sulfur dioxide and nitrogen dioxide in the air. Schools and offices in Bandar Abbas will be closed Sunday as well.

Port is a major destination for Iranian cargo

Shahid Rajaei has been a target before. A 2020 cyberattack attributed to Israel targeted the port. It came after Israel said that it thwarted a cyberattack targeting its water infrastructure, which it attributed to Iran. Israeli officials didn't respond to requests for comment regarding Saturday's explosion.

Social media videos showed black billowing smoke after the blast. Others showed glass blown out of buildings kilometers, or miles, away from the epicenter of the explosion. State media footage showed the injured crowding into at least one hospital, with ambulances arriving as medics rushed one person by on a stretcher.

The Interior Ministry said that it launched an investigation into the blast. Iranian President Masoud Pezeshkian also offered his condolences to those affected in the blast.