Police have detained web channel editor Sudhanshu Sekhar Raut and also seized computers and other material from the accused.
Mitra, who was arrested on October 23 this year and lodged in the high-security Jharpada jail in Bhubaneswar, was admitted to the Capital Hospital here late Saturday night, a hospital official said.
Maoist-chosen mediators discussed certain key demands of the rebels with hardcore Naxal leader Ganti Prasadam in Bhubaneswar on Monday, as negotiations for the release of the abducted Malkangiri district collector and a junior engineer reached a crucial stage.
Bandopadhaya claimed he was innocent and had no involvement in the scam.