According to sources, the Kolkata Police formed the SIT to probe the fraud charges against the Alchemist group after an FIR was registered against three officials of the companies on March 16.
Acting on investors' complaints, a case was registered against three companies of the group at Bowbazar police station, he said.
There are allegations against the group of cheating investors of Rs 2.53 crore, the officer said.
Singh's name has surfaced in the Narada sting operation case after Narada News CEO Mathew Samuel claimed that the Rajya Sabha MP had given him Rs 80 lakh for the sting operation.
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