The sleuths of the Enforcement Directorate are making searches at four properties in Chennai since this morning. Raids are also going on at two locations in Kolkata. The raids are said to be a sequel to the investigation into the Aircel-Maxis deal. <br/><br/>The properties being raided in Chennai are said to be those of former Union Minister P. Chidambaram's close relatives. The case relates to the clearance given by the Foreign Investment Promotion Board for the controversial deal when Mr Chidambaram was the Finance Minister at the Centre.<br/><br/>