AP HC had stayed investigation due to unclear inter-state border
The CBI has so far investigated the illegal mining operations of only two leases held by Reddy's companies.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/two-key-illegal-mining-cases-against-reddy-yet-be-probed
[2] http://admin.indiaenvironmentportal.org.in/category/author/ambarish-b
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-herald-bangalore
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/karnataka
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/illegal-trade
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ballari
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court