Several firefighting units have been dispatched to the factory in the Bayezid Textile area
Mohammad Nayan, 17, died at the Chittagong Medical College and Hospital’s burn unit on Saturday evening.
Doctor Mrinal Kanti Das said he had suffered 70 percent burns.
A tin-shed colony at Bandartila caught fire on Wednesday from a gas stove.
Nayan, his sister Nargis Akter, 20, Mosammat Salma, 21, and her sister Kohinur Akter, 20, all garment factory workers, were burned in the accident.