Metropolitan Magistrate Abhilash Malhotra said the plea has been filed against "influential persons" and the security of the complainants are of "paramount importance".
The court asked the Additional Commissioner of Police of ACB to assess the threat perception after complainant Rahul Sharma claimed he and his family members were receiving threats.
"Additional CP of ACB is directed to immediately assess the threat perception and take necessary steps for providing security (if necessary)," the court said and asked ACB to file a compliance report on April 3.
"Despite that untoward incidents have taken place and FIRs have been lodged at various police stations. Complainants have filed the present case against the influential persons and security of the complainants are of paramount importance," the court said.
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Meanwhile, the court rejected Sharma's plea for an early hearing, saying the date for the next hearing was fixed with mutual consent.
Earlier, Delhi Police informed the court that the plea has been transferred to the ACB.
Advocate Kislay Pandey, appearing for Sharma, had alleged "deep-rooted corruption" and said the documents showed no material was actually purchased for executing the projects.
The complainant has alleged documents showing purchase of material were "concocted and forged", and a loss of over Rs 10 crore had been caused to the public exchequer.
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