"They - Janardhana Reddy, Anand Singh and Suresh Babu - got bail in one of the cases (Belikeri illegal mining case)," a CBI official told PTI here.
However, all the three will stay in jail because they have to get bail in two more cases, the official added.
BJP MLA and former Karnataka Minister Singh and BSR Congress MLA Suresh Babu were arrested last year in connection with the case.
The central agency had summoned Singh for questioning in September, but he had failed to turn up and fled reportedly to Singapore from where he filed an anticipatory bail plea before the CBI court on medical grounds, fearing arrest.
Thereafter CBI arrested Singh's aide and employee Muthiyala Shivakumar on September 23.
Babu is a nephew of Sriramulu, a close associate of former minister and mining baron G Janardhana Reddy, lodged in jail Parapanna Agrahara Prison.
Babu is also named as an accused in the cash-for-bail scam in which a CBI judge was allegedly bribed for granting bail to Janardhana Reddy, prime accused in the Obulapuram Mining Company scam probed by the CBI.
