(REUTERS)

A huge blast probably caused by the explosion of chemical materials killed at least five people and injured more than 700 on Saturday at Iran's biggest port, Bandar Abbas, Iranian state media reported.

The explosion hit the Shahid Rajaee section of the port.

Hossein Zafari, a spokesperson for Iran's crisis management organisation, appeared to blame the explosion on poor storage of chemicals in containers at Shahid Rajaee.
"The cause of the explosion was the chemicals inside the containers," he told Iran's ILNA news agency.

"Previously, the Director General of Crisis Management had given warnings to this port during their visits and had pointed out the possibility of danger," Zafari said.

However, an Iranian government spokesperson said that although chemicals had likely caused the blast, it was not yet possible to determine the exact reason.

Iran's President Masoud Pezeshkian ordered an investigation of the incident and sent his minister of interior, who said efforts were still ongoing to extinguish the fire and prevent it from spreading to other areas.

Iran's official news channels aired footage of a vast black and orange cloud of smoke billowing up above the port in the aftermath of the blast, and an office building with its doors blown off and papers and debris strewn around.

Located near the strategic Strait of Hormoz, Shahid Rajaee port is Iran’s biggest container hub, handling a majority of the country’s container goods, according to state media.

The blast shattered windows within a radius of several kilometres and was heard in Qeshm, an island 26 kilometres south of the port, Iranian media said.

State TV earlier reported that poor handling of flammable materials was a "contributing factor" to the explosion. A local crisis management official told state TV that the blast took place after several containers stored at the port exploded.

As relief workers tried to put out fires, the port's customs officials said trucks were being evacuated from the area and that the container yard where the explosion occurred likely contained "dangerous goods and chemicals". Activities at the port were halted after the blast, officials said.

DEADLY INCIDENTS

A series of deadly incidents has hit Iranian energy and industrial infrastructure in recent years, with many, like Saturday's blast, blamed on negligence.

They have included refinery fires, a gas explosion at a coalmine, and an emergency repairs incident at Bandar Abbas killed one worker in 2023.

Oil facilities were not affected by the blast on Saturday, Iranian authorities said.

The National Iranian Petroleum Refining and Distribution Company said in a statement it had "no connection to refineries, fuel tanks, distribution complexes and oil pipelines."