The PE has named Videocon group promoter Venugopal Dhoot, Deepak Kochhar and unknown others, they said.
A PE is a precursor before the agency lodges an FIR to probe criminal charges on the basis of evidence collected during the former exercise.
The deal recently made news after reports questioned the loan and linked it to a possible quid pro quo that Dhoot allegedly had with NuPower Renewables, a company founded by Deepak Kochchar.
Earlier this week, the ICICI Bank board came out in support of Chanda Kochhar, saying it has full faith and confidence in her and described certain reports against her regarding credit disbursement to Videocon group as "malicious and unfounded rumours".
The board had also reviewed the banks internal processes for credit approval and found them robust, the private sector lender had said in a statement.
With regard to loans to the Videocon group, it said the banks current exposure is part of a syndicated consortium arrangement.
"ICICI Bank was not the lead bank for this consortium and the bank only sanctioned its share of facilities aggregating approximately Rs 32.5 billion which was less than 10 per cent of the total consortium facility in April 2012," it added.
The bank had clarified that none of the investors of NuPower Renewables are borrowers of ICICI Bank.
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