The incident occurred late last night in Saini Mohalla in Govindgarh town when the fireworks stored in a house caught fire. Soon the blaze spread to other areas and a cylinder kept in the house also exploded due to the fire.
The deceased have been identified as Pappu, his wife Kamla, their daughter Puja and another man Pandey. The injured have been admitted to a hospital in stable condition, SHO Govindgarh Baney Singh said.