NEW DELHI: Officials on Friday conducted a demolition drive in Malviya Nagar area on unauthorised constructions amid heavy security.The Municipal Corporation of Delhi (MCD) on Friday began sealing unauthorised establishments in various south Delhi commercial hubs.The action was initiated against commercial establishments found operating in violation of building bye-laws and licence conditions, they said.According to officials, at least ten such establishments, including several restaurants, will be sealed in Saidulajab area, Hauz Khas Village, and nearby areas in South Delhi."Two buildings have already been sealed in the Hauz Khas Village, six buildings have been identified in Saidulajab and will be sealed today, and few other buildings will be sealed in nearby areas," a senior MCD official said."Identified unauthorised establishments near Hauz Rani area, where the fire incident took place, will be sealed soon, and we are waiting for their bed-and-breakfast licences to be revoked," he added.According to officials, at least four MCD teams comprising multiple junior and assistant engineers have been deployed for the sealing exercise.The move comes days after a deadly fire at a bed-and-breakfast facility in Malviya Nagar area claimed 21 lives, exposing large-scale violations such as operating beyond permitted capacity and absence of a sanctioned building plan, officials said.