The injured--Manab Chowdhury, his wife Bacha, their daughters Tinni, Munni and Moure-- were rescued and taken to the emergency unit of National Institute of Burn and Plastic Surgery, said resident surgeon Dr Shawon Bin Rahman.
Of them, Manab sustained the most severe injuries, with 70 percent burns, while Bacha suffered 45 percent.
Their children Mouri, Munni and Tinni suffered 36, 28 and 22 percent burns respectively, reports UNB.
Details of the incident are still awaited.