One person was injured today in Delhi Sadar Bazar due to falling of a staircase of a building. Police said, prima facie it seems to be due to explosion in the water pipe. There is no fire or smell of any chemical. Police said, Crime and FSL teams are going to the site. DCP North, Delhi told, around 6: 15 something like a blast has happened in a shop in Thana Sadar Bazar. FSL and crime teams have been called on the spot, they will investigate. One person has been injured in the accident, his treatment is going on, he is out of danger.