The workers were present in the factory when the blast occurred suddenly. (Representational image)
The blast occurred in Gujarat's Bhavnagar district on Sunday and injured nine workers, police said.
Approximately one hour and a half earlier on Saturday evening, a fire broke out at Arihant Furnace Rolling Mill located near Sihor town in the district, nearly 200 km from Gandhinagar, a police official said.
The blast occurred suddenly in the factory, while nine workers were present.
Officials said they were all taken to a government hospital in Bhavnagar and are trying to find the cause of the blast.