A Delhi court today extended till 9th August the interim protection from arrest to former Union minister P Chidambaram and his son Karti in Aircel-Maxis cases. <br />''<br />''The cases relate to alleged irregularities in grant of Foreign Investment Promotion Board approval in the Aircel-Maxis deal. <br />''<br />''The Court extended the relief after the argument on anticipatory bail plea of the father-son duo remained inconclusive as the CBI and the ED sought time to argue the matter further. <br />''<br />''During the hearing, Chidambaram told the court there was no ground for it to deny them anticipatory bail, opposed by the two central probe agencies. <br />