The Investigators believe that the blast at the oxygen plant of Seema Re-Rolling Mills in Sonaichhari near the Dhaka-Chattogam Highway in Sitakunda might have originated in its air separation unit.
Directorate of Explosives believes that the deadly blast occurred in air separation column.
The investigation team of the district administration also feels that the explosion may have occurred from the air separation column.
The fire service says that the fire did not cause the explosion, the explosion caused by the fire.
Earlier, members of district administration investigation committee visited the site and collected evidence on Sunday.
“The inquiry committee suspected the blast originated in the air separation column of the oxygen plant,” said Rakib Hossain, Additional Deputy Commissioner, also head of the investigation committee.
Rakib Hossain said they need to carry out more investigation to find out the actual cause of the accident.
Another investigation committee member Dr Suman Barua, chairman of applied chemistry of Chattogram University, said the blast was caused by pressure fluctuation in the air separation plant.
They apprehended that the pressure was not released properly.
Rakib Hossain said the factory engineer could not provide proper answers to questions from the committee as he did not have a clear idea about the technical matters related to the plant.
The committee would ask the owner Mamun Uddin for the information, he said.
Six people were killed and 25 others injured as a fire broke out at a private oxygen plant following an explosion in Kadam Rasul (Keshabpur) area of Sitakunda upazila of the district on Saturday.
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