Former Union Minister P Chidambaram spent the night at the Central Bureau of Investigation (CBI) headquarters after a dramatic arrest late on Wednesday from his house in south Delhi by officials who even climbed a wall in their attempts to get to him. Mr Chidambaram was put up in "Lock-up suite 3" of the CBI building, which was inaugurated in 2011 in his presence; as Home Minister of the Congress-led government at the time, he was special guest and, along with then prime minister Manmohan Singh, was taken on a tour of the building and its lock-up facilities.