Karti Chidambaram, the son of former Union minister P Chidambaram, who was arrested in Chennai yesterday in connection with a corruption case, has been sent to the custody of the Central Bureau of Investigation for questioning till March 6. The agency had sought two week's custody of the 46-year-old businessman, contending that he was not cooperating with the investigation. Karti Chidambaram is accused of getting government clearance for foreign investments worth around Rs. 300 crore in television company INX Media in exchange for bribes back in 2007.