
The injured are Monowara, 60, Zill Haque, 37, Umme Humaira, 30, and two-year-old Hurram.
The victims were rescued and taken to the emergency department of the National Burn and Plastic Surgery Institute around 6 am, hospital sources said.
Resident Surgeon Dr Shawon Bin Rahman said they were brought from Daudkandi area in burned condition early in the morning.
He said Monowara suffered two percent burns, Zill Haque 54 percent, Umme Humaira 65 percent and child Hurram six percent, reports UNB.
The condition of Zill Haque and Umme Humaira is critical due to the extent of their burns, the doctor added.