A massive explosion at an Iranian port has left at least five people dead and more than 700 injured, according to reports from local media and international security firms.

The blast, which rocked the key port city late Thursday night, is believed to be linked to a shipment of missile fuel that arrived earlier this year.

Private security firm Ambrey reported that the port had taken delivery of a significant quantity of “sodium perchlorate rocket fuel” in March, intended to replenish Iran’s missile stockpiles.

Authorities say the explosion caused extensive damage to port infrastructure, nearby warehouses, and residential areas within several kilometers of the blast site.

Witnesses described scenes of chaos as emergency crews rushed to contain fires and rescue trapped civilians amid the debris.

Hospitals in the region were overwhelmed with casualties, with many suffering from burns, respiratory distress, and injuries from falling debris.

Iranian officials initially blamed the blast on an industrial accident but have since launched an investigation into possible mishandling or sabotage.

Sodium perchlorate is a highly volatile chemical compound commonly used in the production of rocket and missile propellants.

Experts warn that improper storage or transportation of the material can lead to catastrophic explosions, particularly in hot and humid environments.

Ambrey’s report raises concerns about broader safety practices surrounding Iran’s missile development activities, which have long drawn international scrutiny.

The explosion has also sparked fears of further instability in the region, with several neighboring countries closely monitoring the situation.

Iran’s government has yet to release a full account of the incident, and international observers are calling for an independent investigation.

The port is a vital hub for Iran’s commercial and military logistics, and the extent of the damage could have significant implications for future operations.

In the meantime, recovery efforts continue, and authorities have cordoned off the area pending further forensic examinations.