Official sources said the team visited some banks to verify cash transactions of Reddy's supporters.
Cash transaction and bank accounts of MLAs H T Suresh Babu and Somashekhara Reddy were also scrutinised by the ACB and CBI team, they added.
Reddy's brother Somasekhara and Babu have already been arrested by the ACB in connection with the scam.
Reddy, arrested in connection with alleged illegal mining, has been accused of bribing a lower court judge in Hyderabad to secure bail in the case.
