The officials suspect that the chemical materials exploded in the port of Bandar Abbas, the largest container center in Iran, when the death toll reaches 25.
Continuous fires to burn a day after a mass explosion crossed the largest commercial port in Iran in Bandar Abbas, as victims continue to increase.
The number of dead for the mass explosion in Shahid Rajaei Port rose to 25, the Tasnim news agency of Iran reported, citing an official on Sunday, while firefighters continued with their efforts to put out the fire.
About 800 people were reported wounds, authorities said.
“The total number of murdered people is at least 25,” Tasnim said, citing the head of the Judicial Power of the province of Hormozgan, Mojtaba Ghahremani.

On Sunday, a video posted by Tasnim showed a helicopter floating on the site of the incident, trying to help extend the fire as the black and thick smoke increased.
Iranian President Masoud Peeshkian expressed his sympathy for the victims of the deadly explosion, adding that he had “issued an order to investigate the situation and causes.”
The country’s national emergency agency told Tasnim that at least five of the victims had been transferred to the city of Shiraz for more treatment.
“The fire is under control but it is not yet,” said a state television correspondent from the site approximately 20 hours after the explosion.
The Enterkhab news website quoted the National Crisis Management Agency saying that 80 percent of the fire has a bone, and added that the majority of the 752 tasks of people to the medical facilities for the treatment had been unpleasant.
Three Chinese citizens were “slightly injured,” said China CCTV state station, citing her Bandar Abbas consulate.
With the spread of smoke and the air of suffocation that extends through the area, all schools and offices in Bandar Abbas, the capital of the province of Hormozgan, have been ordered on Sunday to allow the authorities to concentrate on the emergency effort, State TV reported.
Dangerous chemicals
The explosion took place on Saturday near the Hortuz Strait, through which a fifth of the world oil production passes.
The Puerto Customs Office said in a statement, carried by state television, that the explosion probably resulted from a fire that exploded in the storage of hazardous and chemical materials.
A person with links with the body of the Islamic Revolutionary Guard of Iran, speaking on condition of anonymity, told the New York Times that the chemist that exploded was sodium’s perclorato, an important ingredient in solid fuel for missiles.

The explosion was so powerful that it felt about 50 km (30 miles) away, Fars news agency reported.
The images of the official Irna news agency showed rescuers and survivors walking through a carpeted boulevard with debris after the explosion in Shahid Rajai, more than 1,000 km (620 miles) south of Tehran.
Speaking later on the scene, Interior Minister Eskandar Momen, told State TV: “All the resources of other cities and Tehran have been sent.”
The explosion occurs several months after one of Iran’s most mortal accidents in years.
The explosion of the coal mine in September, caused by a gas leak, killed more than 50 people in Tabas in the east of the country.
The incident took place as Iranian and American delegations with conversations about Tehran’s nuclear program in Oman for high -level conversations, with both parties informing progress.