
The victims were identified as Kalam, 45, his wife Salma, 40, their son Munna, 12, and two daughters – Munni, 10, and Kotha, 7, of Uttar Bhuigar in the Fatullah area.
Quoting locals, the fire service said the explosion occurred at the flat on the ground floor of an eight-storey building, owned by Md Shahjahan, around 6:55am, leaving five members of the family injured.
The injured were sent to the National Institute of Burn and Plastic Surgery in Dhaka.
"Gas accumulated in the closed room due to a leak in the gas line adjacent to the kitchen. We suspect that the explosion occurred instantly when the tenant ignited a lighter in the morning,” said Md Abdullah Al Arefin, deputy assistant director of Narayanganj Fire Service and Civil Defence.
Of the injured, Kalam suffered burns on 95 percent of his body, while Salma 60 percent, and the three children 30, 35 and 52 percent, respectively, according to Dr Shaown Bin Rahman, resident surgeon of the burn institute, reports UNB.