The BJP leader Janardhan Reddy is an accused in the Bellary mining scam for which Reddy had been in jail since 2011.
The sources refused to share details of Chhattisgarh based business groups which have been named.
The allegation is that the accused were parties to a criminal conspiracy entered among themselves during 2009-2010 to commit various offences including excavation of iron ore from mines.
Sources said K Mahesh was produced before the CBI court on Saturday and remanded in police custody till March 8.
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