The CBI Saturday registered two more cases against the Saradha group of companies in its investigation into the multi-crore-rupee chit fund scam.A special Central Bureau of Investigation (CBI) Crime Branch team registered these two cases in Kolkata against the Saradha group and its chairman and managing director Sudipta Sen on allegations of criminal breach of trust and cheating.The cases were referred by Assam for CBI investigation, a CBI official said here.