Sources said the department made one of its highest seizures which also includes jewellery worth Rs one crore.
The entire cash, they said, has been remitted in a public sector bank branch in Delhi.
When contacted by PTI, Sahara group said, "Please note that the amount mentioned in your query is not correct. But whatever may be the figure, each and every penny is company's legitimate money."
"Under such circumstances we are tightly managing the affairs of our big organisation and hence some legitimate cash is kept at various points for various kinds of requirements and higher emergencies. As getting bigger amounts from bank account is extremely difficult and when, which account, SEBI will seize, we do not know," the Sahara spokesperson added.
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Through the Central Board of Direct Taxes, the tax department is expected to inform the Enforcement Directorate about the cash for probe of any suspected hawala transactions under the Foreign Exchange Management Act.
They added that a report in this regard has already been sent to the Special Investigation Team on black money.
The department, they said, will now issue notices to the Sahara group to "explain the source of this cash".
Recently, another central investigative agency Enforcement Directorate registered a money laundering case against the group in connection with non-payment of crores of rupees to depositors as probed by capital markets regulator SEBI.