NEW DELHI, Nov. 6 -- Neighbours report that the first collapse on Sheesh Mahal street in Chawri Bazar occurred around 9.30am. What they heard was the sound of the third floor of the under-construction structure giving way. Within the next 20 minutes, the remaining two floors had also come down. It felt like a "bomb explosion", said one resident. Eyewitness Salman Hashmi, 28, said the lintel of the third floor of the building collapsed initially, prompting them to immediately evacuate the area. When the next collapse happened, several workers were trapped beneath the debris. "Some workers managed to escape when the roof of the third floor collapsed, sustaining injuries to their heads and hands in the process. We don't know why those who were...