A Delhi court yesterday sent former Union finance minster P Chidambaram in judicial custody till September 19 in the INX Media case. Considering that he has Z-security, the court directed that he be kept in a separate cell. The CBI argued for his judicial custody submitting that there was strong apprehension that he would tamper with evidence and influence witnesses if released on bail. Chidambaram’s 15-day CBI custody, ordered by the special court in five spells that started after his arrest on August 21 night, ended yesterday. The allegations in the case centre around the role of Chidambaram, his son Karti Chidambaram, and several former government officials, in approving foreign direct investment in local media firm INX Media in 2007. The Central Bureau of Investigation says the approval was illegal and that it was a case of “abuse of power”.