New Delhi, June 5 -- The investigation of the Malviya Nagar fire tragedy is with the Delhi police under the BNS, said Chief Fire Officer AK Malik on Thursday.

"We observed that the building was so designed that the occupants find it very difficult to escape because what we observed during the firefighting and search and rescue operation, which we conducted, the complete building is sealed. All the windows of the building are sealed properly and permanently... In such buildings, an occupant has very few seconds or minutes to escape from the building. One main reason is that the fire was on the ground floor. So they don't get a chance to escape from the building... In this case, the building was ground plus five, and under the building by-...