A preliminary expert report on the building collapse in Istanbul's Maltepe district has come to light, and it reads badly for the authorities. The experts established that four floors of the seven-storey building were added without any permit. A decision had been taken to demolish those unauthorised floors at an earlier stage. That order, the report notes, was never carried out, leaving the structure to operate in open breach of its approved design. The finding points to failure in municipal enforcement long before the collapse, not merely a construction defect. CNN Türk correspondent Merve Tokaz relayed the details of the document to the channel's audience. Attention is now likely to shift to who approved the illegal additions and why the demolition order was left unexecuted.