Seventy-four people were killed and scores injured when the unauthorised under-construction building located in Lucky Compound in the Thane district suburb near Shil Phata, crumbled on April 4.
The accused, including three co-owners of the construction firm, two builders, besides civic officials and NCP corporator Hira Patil (now suspended), were arrested under various sections of Indian Penal Code, including 304 (punishment for culpable homicide not amounting to murder) and section 13(1) (d) of the Prevention of Corruption Act, 1988.
Assistance Commissioner of Police (Crime) Pandit Kendre told the court that police were awaiting response from the municipal corporation on the documents recovered and have already seized cash and some documents from residences of some of the accused.
On the course of investigation, he said that police were in the process of establishing bank transactions of the accused.
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In a separate development, Assistant Public Prosecutor Ruma Navle excused herself from the case as her husband is representing one of the accused, and was replaced by Hemlata Deshmukh.
Police had said that the accused builders bribed public servants, including the civic authorities, police and the elected corporator, with lakhs of rupees to ensure that the construction work continued without any hindrance.