NDTV accessed the gutted building at the centre of the Lucknow coaching centre fire tragedy that claimed 15 lives. Visuals from inside revealed charred classrooms, melted computer equipment and debris, while investigators examined the site for clues. Authorities are also probing whether the structure, reportedly classified as residential in official records, was later converted into a commercial establishment. As the SIT investigation widens, officials are scrutinising permissions, safety compliance and the possible role of regulatory lapses in the disaster.