A day after one person was killed and eight others were injured when two adjacent buildings collapsed in Masjid,civic officials claimed that MHADA had failed to obtain the BMCs permission before starting repair works on one of the two buildings. The civic body is still not certain about what could have caused the buildings to collapse. Building numbers 40 and 38 at Kazi Sayyed Road,both over 100-years-old collapsed on Saturday evening,claiming the life of a labourer Rustom Sheikh who was in building number 38. Assistant municipal commissioner,DR Jadhav,said,MHADA had not obtained the permission from the buildings proposal department of the BMC before starting repair work on building number 40. We had not carried out the structural audit of the building. Deputy municipal commissioner,Milind Sawant,said that some structural alterations were being made in building number 38. We are not aware of the exact cause of the collapse, said Sawant.