The blast broke out during the evening in a private building that had combustible material put away on the ground floor.
Individuals from a wedding party are believed to be among the people in question. It isn't yet clear what begun the shoot.
The hundreds of years old Chawkbazar area has limited boulevards and structures near one another.
Expansive building fires are moderately basic in thickly populated Bangladesh, attributable to remiss security controls and poor conditions. Several individuals have been executed as of late.
On Sunday, a flame in a ghetto in the seaside city of Chittagong killed no less than nine individuals.
The flame broke out in a blended use working at 23:40 neighborhood time (17:40 GMT) on Wednesday, when numerous occupants were dozing.
It began at a compound stockroom on the ground floor and after that dashed through three different structures, authorities said. Numerous individuals were caught, powerless to get away from the flares.