Kolkata: The Special Crime Branch of CBI probing the multi-crore Saradha scam will file a supplementary charge sheet by this week, a source in the investigating agency said.

"We are going to file the supplementary charegsheet in the Saradha Realty case at Alipur Court by this week," the CBI source said.

The chargesheet would include names of Bengal minister Madan Mitra, former Trinamool Congress Rajya Sabha MP Srinjoy Bose, now released on conditional bail, and suspended TMC MP Kunal Ghosh among others.

The source said the supplementary chargesheet would contain names of influential persons who had been the main conspirators in the scam. Mitra, now under judicial custody, had moved a bail petition in the Calcutta High Court, the hearing of which is yet to take place.

Earlier, the agency had filed chargesheets against the other accused in the Saradha scam, namely Sudipto Sen, Debjani Mukherjee, Rajat Mazumdar (now released under conditional bail), Sadanand Gogoi, Debabrata Mazumdar and Kunal Ghosh in separate cases related to other Saradha companies. Meanwhile, ED sources said it would also file its chargesheet once the CBI files its supplementary chargesheet.