Former Trinamool Congress leader Sovan Chatterjee, who has been arrested by the CBI in connection with the Narada sting tape case, was discharged from the state-run SSKM Hospital late on Saturday evening on personal risk bond, sources in the hospital said.

Chatterjee, a former mayor of Kolkata, then went to the Presidency Correctional Home, where he was lodged before being admitted to the hospital, signed the necessary documents and left for his residence where he will be under house arrest as per the order of the Calcutta High Court.