The injured are Raihan, 45, his wife Maya, 30, and their daughters Morium, 2.
Raihan received 4% burn while Maya received 30% and Morium 65% burn in the incident.
Dhaka Medical College Hospital (DMCH) police outpost SI Bachchu Miah confirmed the matter to Dhaka Tribune on Tuesday morning.
He said: “The fire broke out around 5:30am. Their neighbours brought them to the hospital around 7am.
“They are being treated at the hospital’s burn unit.”