CBI sources said both appeared for questioning in the afternoon and the exercise is still continuing.
CBI had registered a case against the then UB Group Chairman Vijay Mallya, Kingfisher Airlines, its Chief Financial Officer Raghunathan and unknown officials of IDBI Bank alleging that a Rs 900 crore IDBI Bank loan was sanctioned in violation of the norms regarding credit limits on the basis of a complaint received from the bank.
