The CBI on Friday filed a charge sheet against 18 people in Aircel-Maxis deal case including former Finance Minister P. Chidambaram and his son Karti. The agency filed the charge sheet before Special Judge O.P. Saini who listed the matter fore hearing on July 31.

The Central Bureau of Investigation (CBI) and the Enforcement Directorate are investigating Karti Chidambaram's alleged role in getting Foreign Investment Promotion Board (FIPB) clearance for the Aircel-Maxis deal in 2006 when his father was the Union Finance Minister.