Hindustan Times. New Delhi, Nov 7 (PTI) The death toll in the three-storey building collapse in Old Delhi's Hauz Qazi area rose to six on Saturday, and the building owner and three contractors have been arrested. New Delhi: The death toll in the collapse of an under-construction building in Old Delhi's Chawri Bazaar area rose to six on Saturday, with police arresting the building owner and three contractors.