They said summons for questioning have been issued to at least four officials and once they depose, their statements will be recorded under the Prevention of Money Laundering Act (PMLA).
While some of these officials have been summoned by the Enforcement Directorate (ED) in the past for questioning in the Aircel-Maxis FIPB case, some will be questioned afresh in connection with the INX case.
The agency will also question Peter Mukerjea, former director of the media group, again at a Mumbai jail tomorrow in connection with the case.
Peter Mukherjea is in prison in connection with the Sheena Bora murder case and has been questioned by the ED last year.
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The agency is also probing the transfer of about Rs 1.8 crore, in multiple tranches, from a Chennai bank account, allegedly belonging to Karti, to a senior political leader connected to him, they said.
Karti, arrested by the CBI in this case, was yesterday confronted by the sleuths with Peter's wife Indrani Mukerjea in a Mumbai jail.
Indrani had also been a director of the media company under scanner.
Karti was arrested by the CBI last week on the basis of confessional statements of Peter and Indrani who alleged that they paid USD 7 lakh to him on the instructions of his father P Chidamabaram, as quid pro quo for a FIPB clearance, officials had said.
The couple had also admitted that they subsequently met Karti at a five-star hotel in Delhi, where he allegedly made a demand of USD 1 million, they said, adding that this was reiterated by Indrani before the magistrate as well.
Indrani, they said, had confirmed in her statement to the CBI and ED that a payment of USD 7 lakh was made to the bank accounts of overseas firms linked to Karti.
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