The Enforcement Directorate (ED) conducted a raid at former union minister P. Chidambaram's son Karti Chidambaram's homes in Delhi and Chennai in the alleged INX Media bribery case, on Friday.
The raid is still going on.
According to sources, the ED officials started the raids at 7.30 am. There were about five officials at their residence.
The ED had, on January 11, issued fresh summons to Karti, in which he has been asked to appear on January 16. The fresh summons came after he skipped his appearance before it in connection with the INX Media money laundering case probe.
The central probe agency had registered a case against him and others in May this year.
It had registered an Enforcement Case Information Report (ECIR), the ED's equivalent of a police FIR, against the accused named in a CBI complaint, including Karti Chidambaram, INX Media and its directors, Peter and Indrani Mukerjea.
The ECIR was lodged under the provisions of the Prevention of Money Laundering Act (PMLA).
The sources said that the ED will probe the alleged "proceeds of crime" generated in this case.
It was the ED which had provided information about the alleged illegal payments made by INX Media, based on which the Central Bureau of Investigation had filed its FIR.
The CBI had also carried out searches at the homes and offices of Karti Chidambaram across four cities for allegedly receiving money from the media firm owned by the Mukerjeas to scuttle a tax probe.
The Chidambarams have denied all the charges made against them.