India, July 12 -- The Central Bureau of Investigation (CBI) has stepped up its probe into the alleged multi-crore IDFC First Bank fraud involving eight Haryana government departments. As part of the ongoing investigation, the agency has sought permission to collect voice samples of key accused and has widened its inquiry into the alleged involvement of senior bureaucrats and bank officials.

The case is being investigated simultaneously by the Enforcement Directorate (ED), which is tracing the alleged money trail, while the CBI is examining the alleged criminal conspiracy, the role of public servants and banking officials, and the administrative approvals that allegedly facilitated the diversion of government funds.

Sources familiar with t...