City Sessions Court Judge Arvind Mishra said Nagel be "released at once" when he was produced by CBI here.
CBI counsel submitted that Nagel, who was arrested in Saradha Tours and Travels case and was an employee of the Saradha Group, could be released since his name was not in the charge sheet framed so far and no documents were found in his possession.
The counsel said that CBI had no objection if he was released by the court.