CBI sources said the only material change that took place between rejection of Hindalco's application during 25th screening committee and allotment were two letters routed to Parakh through Prime Minister's Office and his personal meeting with Kumar Mangalam Birla, Chairman of Aditya Birla Group.
The sources said although Parakh's explanation was that decision was reversed for larger public good, he apparently did not specify what was prompted him to change his own decision and, if at all, there was one why the application was rejected in the first place.
They said CBI would examine in detail Odisha government officials who had processed files related to allocation of coal blocks to Hindalco and what were the reasons for such a support.
Justifying the FIR, the officers associated with the probe, said they had registered it based on facts available on the file which does not explain cogent reasons for allotment of Talabira coal block to Hindalco.
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The sources said a letter has already been sent to Prime Minister's Office seeking files related to allocation of Hindalco and the reply is awaited and any future action would be taken after receiving the same and analysising it.
Prime Minister's Office has given a rebuttal to CBI allegations and said Prime Minister Manmohan Singh was satisfied that the final decision taken in this regard had been "entirely appropriate" and based on the merits of the case placed before him.