The department of explosives has found the existence of hydrocarbons on the ground floor of Shawarma house in the capital’s Moghbazar.
A huge blast rocked Shawarma house on Sunday evening leaving six people dead and around 200 people injured.
The chief inspector of the department Abul Kalam Azad confirmed the matter on Monday after the inspection of the Shawarma house.
He said hydrocarbon is an ingredient of natural gas. However, it is unusual to cause such a huge explosion from gas alone. A three-member probe body has been formed to look into the matter and the investigation report will be submitted to the government by seven days.
Abul Kalam Azad said the reason behind the blast is yet to be known. Actual reason will be disclosed following the investigation. Now, the explosives department is collecting the information, he added.