The Enforcement Directorate recently questioned Unitech MD Sanjay Chandra, an accused in the 2G spectrum allocation scam over investments made in a tax haven abroad.
Chandra, who was recently released on bail in the case, has been questioned by ED twice regarding an investment of about Rs 230 crore by his company in the Isle of Man.
Official sources said this transaction came to light during its multi-layered probe into the 2G scam which involved investments in various foreign locations, including Mauritius.