Sources said that the agency's Kolkata zonal office was preparing to summon atleast three CPM leaders "to obtain their side of information" in the case in which depositors have raised their grievances for being duped by the group through alleged chit fund operations.
After a five-month long probe, the agency has found some connection of these leaders with Sudipta Sen, the promoter of the Saradha group, and some of his associates, sources in the ED said.
They added that while the Left leaders have not been named in its FIR filed in the case under Money Laundering Laws, the versions of CPM leaders were important before filing of charge sheet or any further action by them.
The central probe agency will soon issue summons to these leaders to "join investigations."
"These leaders have already given their side of the evidence to state investigating agencies after the scam came to the fore and hence it was felt necessary to seek their statements in the money laundering case," ED sources said.
The Rs 2,460 crore chit fund scam in West Bengal involving the Saradha Group came to the fore last year when 80 per cent of the depositors complained that their money still remained unpaid.