Earlier on Saturday, Faruk, a shop employee injured in the incident, died at a city hospital.
Seven people including shop owner Abdul Alim, 50, suffered burns in the explosion in the scrapped goods shop near Chand Udyan Bhanga Mosque in Mohammadpur of Dhaka last Tuesday.
Others injured in the incident are Mohammad Faruk, 37, Saidul Islam, Amir Uddin, Md Rasel, Suruj Mollah and Md Kaiyum.
They were taken to Sheikh Hasina National Institute of Burn and Plastic Surgery of DMCH.
Of them, Faruk, Saidul Islam, Amir Uddin and Abdul Alim were undergoing treatment at the hospital while the other three were released.