Gazipur district administration has formed a five-member committee to investigate the fire.
The committee, led by Additional District Magistrate Abul Kalam, has been directed to submit its probe report within seven working days, said SM Tariqul Islam, deputy commissioner of Gazipur district.
The fire broke out at the factory in the upazila s Mulaid area around 4:45pm. Eight units of firefighters were still trying to douse the fire till last reported around 11:15pm, said Miya Raj Hossain, senior station officer at Sreepur Fire Service Station.
The whole building has been used for producing and storing chemicals including hydrogen peroxide, chlorine, bleaching powder, caustic soda, etc. It is preliminary suspected that the fire broke out following an explosion in the storage facility for hydrogen peroxide, the fire service official said.