The sleuths of the Income Tax Department have detected an unaccounted income of more than 400 crore rupees by a prominent business group in Chennai. <br />'' <br />'' They made searches in its premises last Tuesday and the processing of the documents have revealed that the group has been involved in large scale irregularities. <br />'' <br />'' The business house is dealing with non-ferrous metal processing and is also involved in money lending activities.<br />'' <br />'' The officials also unearthed hidden cloud servers other than the regular servers used by the group for accounting, which revealed unaccounted transaction details. <br />'' <br />'' Encrypted data was also retrieved by the officials from a pen drive and decrypted for further probe, as said in a statement by the Income Tax Department.<br />