SDMC’s building department on Friday carried out a major demolition/sealing drive against unauthorised constructions. The drive was carried out in areas like Greater Kailash I, East of Kailash, Lajpat Nagar, Daryagan, Sunder Nagar, Kalkaji, CR Park, Sunlight Colony, Govind Puri, Garhi East of Kailash, Badarpur, Hari Nagar Ashram, Vishwakarma Colony and Kotla Mubarak Pur, etc.