New Delhi: The Enforcement Directorate (ED) on Thursday filed a supplementary charge sheet against former finance minister P Chidambaram in the Aircel-Maxis case.

The supplementary charge sheet, which was filed in Delhi's Patiala House court, named Chidambaram and eight others as the accused.

Earlier, the Delhi high court had extended Chidambaram's interim protection from arrest in the INX Media case till October 25. In April, Indrani Mukerjea, one of the owners of the said media house at the time of unfolding of the alleged financial scandal, had written to the police saying she feared for her safety since the time of testifying against Karti Chidambaram in the bribery case.

Also, Chidambaram and his son Karti were named in the charge sheet filed by the CBI in the Aircel-Maxis case on July 19.

The CBI's case against Chidambaram is that he, as the Union finance minister in 2006, had granted a Foreign Investment Promotion Board (FIPB) approval to a foreign firm, when only the Cabinet Committee on Economic Affairs (CCEA) was empowered to do so.

The senior Congress leader's role has come under the scanner of investigating agencies in the Rs 3,500-crore Aircel-Maxis deal and the INX Media case involving Rs 305 crore.

The ED is also probing a separate money-laundering case in the Aircel-Maxis matter, in which P Chidambaram and Karti Chidambaram have been questioned by the agency.

The Chidambarams have denied the allegations levelled against them by the CBI and ED.

With inputs from PTI