The deceased was identified as Hasina Begum, 40, wife of Arab Al.
Sub-inspector Bachchu Mia of DMCH police out-post said 96 percent of Hasina's body was burnt and she died early in the morning.
Earlier on Friday, five members of a family received burn injuries when a cooking gas cylinder exploded in a house at Jamgarah.
The injured are Arab Ali, 50, Hasina, 40, wife of Arab Ali, Arab's son Abdur Rab, 26, his wife Nipa, 24 and their one and half year old daughter Ayesha.
The gas cylinder blasted when Hasina was trying to light a stove, he said quoting family members.
Later, they were taken to the burn unit of Dhaka Medical College Hospital.