Chief Metropolitan Magistrate Sumit Dass sent Sanjay Jain, Rajiv Jain, Rohit Chaudhary and Sanjeev Agarwal, arrested by the probe agency on the complaint of Punjab National Bank (PNB), to custody till April 22.
The accused were arrested by CBI earlier in the day for allegedly using more than 100 shell companies for routing and diversion of bank funds.
Later, the CBI produced them before the court and alleged that they cheated 17 nationalised and four private banks and sought their 14 days custody.
"We have only option to conduct the custodial interrogation of the accused persons and confront them with each other and some documents," the CBI's counsel said.
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The accused, however, opposed the CBI plea, saying that they should rather be sent to judicial custody.
Advocate Vijay Aggarwal, appearing for some of the accused persons, said that the FIR was lodged in the matter a few years ago and there was no ground of arrest at this stage.
During the proceedings, the counsel also alleged that the CBI itself was flouting the rules and had produced the accused persons before the court after 24 hours of its arrest and sought that strict action should be taken against the investigating officer of the case.
The CBI had alleged that the 100 shell companies used by the accused for routing and diversion of bank funds had no genuine business transactions.
Over Rs 300 crore of working capital was also allegedly moved to six companies set abroad, the agency said.