New Delhi, Jan 24 (PTI) Investigations in the coal block allocations have established irregularities by government authorities in allocation of the natural resources and around 300 companies are under its scanner, the CBI today told Supreme Court.
In an affidavit filed before the apex court, the agency said that it is taking up the probe against each and every company which has been allocated coal block since 1993 and "in particular during the period 2006 to 2008.
