Congress leader P Chidambaram, who had gone incommunicado for a day after his anticipatory bail in the INX Media case was rejected, was on Wednesday arrested by the CBI amid unprecedented drama at his Delhi residence. Video footage showed the officials scaling walls to enter the house. On Wednesday evening, Mr Chidambaram appeared at the Congress headquarters and addressed a press conference. The CBI, which had issued a lookout notice against him, rushed to the party office to arrest him. By then, the Congress veteran and other leaders had left the premises.