The CBI has summoned Karti Chidambaram, son of former Union Minister P Chidambaram, in the Aircel Maxis corruption case today. <br/><br/>The probe agency sources said, Karti has been asked to appear before the CBI in this case. <br/><br/>There are allegations of kickbacks in the Aircel-Maxis deal, which was part of 2G scam during the UPA rule. The CBI and ED both are investigating the case.