The CBI questions revolved around granting of Talabira coal mines in Odhisa to Hindalco as the agency has alleged in its FIR that the company got the coal block even after being rejected by the screening committee.
It alleged that the only material change that took place between rejection of Hindalco's application by the screening committee and allotment were two letters routed to the then Coal Secretary P C Parakh through the PMO and his personal meeting with Kumar Mangalam Birla.
CBI will be filing its final reports in five coal scam cases before March 26.
CBI has filed 16 FIRs which included those against AMR Iron and Steel, JLD Yavatmal Energy, Vini Iron and Steel Udyog, JAS Infrastructure Capital Pvt Ltd, Grace Industries, Jindal Steel and Power, Rathi Steel and Power Ltd, Jharkhand Ispat, Green Infrastructure, Kamal Sponge, Pushp Steel, Hindalco, BLA Industries, Castron Technologies and Castron Mining and Nav Bharat Power Private Limited.
These FIRs were registered after the agency probed three preliminary enquiries related to coal block allocation between 2006 and 2009, 1993 and 2004 and projects given under a government scheme.