The Central Bureau of Investigation on Monday filed a status report in the Supreme Court in the irregularities in coal block allocations between 1993 and 2009.
The report, which was submitted in a sealed cover, is expected to be taken up on Wednesday.
The agency is investigating the role of beneficiary companies and unknown public servants in connection with the allocation of 195 coal blocks in different States. While 16 separate cases of corruption, conspiracy, cheating and deliberate misrepresentation of facts have been registered till now, CBI sources said they are yet to detect any criminality in some of the allocations, about which the Supreme Court has been intimated.
The CBI has completed investigations in six of the cases and will soon initiate the process of finalising the charge sheets.
But, no arrests have been made in any of the cases so far.
The private companies named in the FIRs as accused are BLA Industries, Castron Technologies, Castron Mining, Hindalco, Jindal Steel and Power Limited, Gagan Sponge, Pushp Steel, Jharkhand Ispat, Kamal Sponge, Green Infrastructure, Rathi Steel and Power Limited, AMR Iron and Steel, JLD Yavatmal Energy, Vini Iron and Steel Udyog, JAS Infrastructure Capital Private Limited, Vikash Metal & Power Limited and Grace Industries.