Delhi blast: Locals had filed complaint regarding gas leak, authorities didn't act. Who's the culprit?

Delhi Chhattarpur Blast: The walls of two floors of a building collapsed following a blast near Chhattarpur area in south Delhi on Thursday. According to the Delhi Fire department, they received information about the incident at 9.01 pm and five fire tenders were rushed to the spot. Officials said the second and third floors of the building were damaged in the blast due to LPG gas leakage. 

Delhi blast: Locals had filed complaint regarding gas leak, authorities didn't act. Who's the culprit?
Delhi Chhattarpur Blast: The walls of two floors of a building collapsed following a blast near Chhattarpur area in south Delhi on Thursday. According to the Delhi Fire department, they received information about the incident at 9.01 pm and five fire tenders were rushed to the spot. Officials said the second and third floors of the building were damaged in the blast due to LPG gas leakage.