Bangalore: The CBI has started interrogating former Karnataka Tourism Minister and mining baron G Janardhan Reddy in connection with an illegal mining case, agency sources said on Saturday.

According to the sources, the interrogation began in the morning, a day after Additional Civil and Sessions Court Judge BM Angadi remanded Reddy to CBI custody till March 12.

CBI officials, besides jail authorities were present during the interrogation, CBI sources said.  What transpired was, however, not known.

Reddy and 20 others are facing charges for their alleged involvement in illegal mining, over which the CBI had filed an FIR against them in October last.

Associated Mining Corporation (AMC) and Deccan Mining Syndicate (DMC) owned by Reddy and his wife Aruna Lakshmi have been facing probe over charges of illegal mining.

Both the firms were also involved in illegal transport of iron ore.

Reddy was produced before the Special CBI court here on Friday amid tight security.