An explosion occurred in the furnace of a rolling mill factory in Fatullah, Narayanganj, on Wednesday noon, leaving four workers burned. The injured workers were identified as Mizan, 40, Suman, 33, Milon, 35, and Uzzal, 32. They were admitted to the National Institute of Burn and Plastic Surgery for treatment.

According to hospital sources, Mizan sustained burns on 3 percent of his body, Suman 2 percent, Milon 3 percent, and Uzzal 3 percent. Workers at the factory said the explosion happened while melting old, dirty iron in the furnace, causing sparks to hit the four workers. Colleagues rescued them and took them to the hospital.

Workers claimed that such accidents often occur during the melting of old iron, but since the fire does not spread outside the furnace, the fire service is usually not informed. The factory authorities did not provide any comment, and the officer-in-charge of Fatullah Model Police Station said he was unaware of the incident but would send police to investigate.