The CBI has registered a disproportionate assets case against former Telecom Minister A Raja and 16 others, including his family members and friends, and carried out searches in 20 places here and various locations in Tamil Nadu.
After registering the case in special CBI court, the agency today carried out searches in Delhi, Chennai, Coimbatore, Tiruchirappalli and Perambalur.
The sources said during the probe of 2G spectrum allocation scam against Raja they have come across assets which were disproportionate to the known sources of the former Minister.
The charges, they said, levelled against Raja in the present FIR are under provisions of the Prevention of Corruption Act and related offences.
Andimuthu Raja, former Telecom Minister, is already facing CBI investigations in the infamous 2G telecom spectrum allocation case in which trial is going on.
The Enforcement Directorate is also probing the case in this regard.
Raja had declared assets worth Rs 1.45 crore in his election declaration in 2014, while that of his wife worth Rs 93.93 lakh. His minor daughter holds assets worth Rs 18.15 lakh.