The sleuths of Enforcement Directorate conducted raids at the premises of senior Congress leader P.Chidambaram and his son Karti Chidambaram in Chennai and Delhi Saturday morning. <br/><br/>Mr Karti Chidambaram is facing charges of money laundering in connection with the Aircel Maxis case. <br/><br/>Sources said, four properties were searched in Chennai and one in the national capital. <br/><br/>However, Mr Karti's lawyer has said the Directorate has taken possession of no document during the search. <br/><br/>It is said that the Foreign Investment Promotion Board FIPB in 2006 granted approval for the Aircel-Maxis telecom deal when Mr Chidambaram was the finance minister. <br/><br/>The investigating agency says the FIPB acted beyond its mandate since the investment involved was more than its limit. <br/><br/>However, Mr Chidambaram denies the charge saying, due procedures were followed. <br/><br/>The Enforcement Directorate earlier issued summons to Mr Karti to appear for questioning, saying a firm is controlled by him has been benefiting from the deal, which he denies. <br/><br/>The case investigating being investigated by the CBI as well.