The duo was also called yesterday and the marathon questioning lasted till midnight, sources said.
Read more from our special coverage on "KINGFISHER AIRLINES"
CBI had registered a case against the then UB Group Chairman Vijay Mallya, Kingfisher Airlines, Raghunathan, and unknown officials of IDBI Bank alleging that a Rs 900 crore loan was sanctioned by the IDBI to the airliner in violation of norms regarding credit limits. The case was registered on the basis of a complaint received from the IDBI bank.
CBI had alleged that Kingfisher Airlines had diverted a substantial chunk of the loans secured from public sector banks to tax havens for purposes not specified in loan applications.
The 10 public sector banks whose loans have come under the scrutiny of CBI, besides IDBI, are UCO bank, Punjab National Bank, State Bank of India, Vijaya Bank, Bank of Baroda, Corporation Bank, Bank of India, United Bank of India, State Bank of Mysore and Indian Overseas Bank.
The total default in repayment of loans by Kingfisher Airlines, which stopped its operations in October 2012, is over Rs 9000 crore.
Meanwhile, CBI is planning to send Letters Rogatory to some countries where the money so diverted by the company was invested.
A consortium of banks led by State Bank of India wants to liquidate Mallya's assets to recover the loans.