The injured people were identified as Salam Mondol, 55, his wife Bulbuli Begum, 45, a garment worker, son Md Tutul, 25, daughter Sonia Akhter, 22, and granddaughter Mohejabeen, 7.
They are in critical condition at the Sheikh Hasina National Institute of Burn and Plastic Surgery, Dhaka Tribune reported.
Md Tariqul Islam, resident surgeon of Sheikh Hasina National Burn and Plastic Surgery Institute confirmed the incident, adding that the condition of the five burnt people is critical.