NOB-Delhi news: The Supreme Court recently expressed dissatisfaction over the affidavits filed by authorities in Kolkata, Delhi and Hyderabad for failing to explain how and when manual scavenging and manual sewer cleaning would be stopped in their cities. Particularly, the court has noted that Delhi Jal Board, Kolkata Municipal Corporation and Hyderabad Metropolitan Water & Sewerage Board have not given any explanation as to how deaths due to manual scavenging and manual sewer cleaning have occurred when the authorities claimed that the practice has stopped in their respective cities.