New Delhi, Oct. 6 -- Acting on a request from the US department of justice (DOJ), the Central Bureau of Investigation (CBI) has sought attachment of a portfolio held by an Indian national in an Indian cryptocurrency exchange in connection with a bank impersonation investigation in Florida, people familiar with the development said on Sunday.

The individual, identified as Punam Jaiswal, is deceased. However, officials said the proceeds of crime are being seized as ordered by the circuit court of 5th judicial circuit in Hernando County, Florida and the request of the DOJ under the mutual legal assistance treaty between the two countries, officials said.

The US agencies were investigating a bank impersonation scam in Florida, involving the...