CBI sources said the agency would inform the Supreme Court about the status of cases on October 4 and would proceed to file charge sheets.
They did not give details of the cases in which it is likely to file charge sheets as reports are being handed over in sealed covers to the apex court which is seized of the matter.
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CBI is probing alleged irregularities in the allocation of 192 coal blocks which were made between 1993 to 2011. The agency has registered three preliminary enquiries relating to allocations between 2006-09, allocations between 1993 to 2004 and allocations given to joint ventures.
So far, the agency has registered 13 FIRs arising out of its preliminary enquiries covering allocations between 2006-09.