A DAY a massive fire at a residential high-rise in Dongri injured four people, the Mumbai Fire Brigade (MFB) Thursday found that the building’s internal fire fighting system was inoperative when the fire broke out. Amid the ongoing investigation, senior MFB officials said that a notice has been issued to the building developer, calling for the submission of documentation pertaining to the original building plan, fire NOCs etc. On Wednesday afternoon, four people, including a woman firefighter, were injured after an LPG cylinder explosion inside a flat on the fifteenth floor triggered a level-three fire at the 22-storey building in Dongri’s Nishanpada road. Following the incident, local residents alleged that the flat, where the fire broke out, had been constructed illegally in an area, which was originally designated to be a “refuge area”. Congress MLA from Mumbadevi Amin Patel had also instructed the Chief Fire Officer to conduct a thorough probe into the unauthorised constructions within the building. Speaking to The Indian Express, an MFB official said, “While one team of MFB gauged and examined the extent of fire, another team examined the refuge area and inspected other aspects such as the internal fire fighting system of the building. We found that the fire fighting system was not operational.” “Under the provision of the fire Act, we have issued a notice to the building developer asking them to submit the details of the original, approves building plan, OCs as well as other documents pertaining to the renewal of fire NOCs," he added. Officials maintained that if the developers failed to furnish documentation within stipulated time frame, another notice will be issued to them.