The probe into the dealings of the firm owned by Reddy brothers — Tourism minister G Janardhana Reddy and Revenue minister G Karunakara Reddy - was ordered by the Centre.

Senior port officials said the CBI team had visited the dock area to find out whether the Reddy brothers had traded the iron-ore through the Haldia dock. “There was no raid. They merely came to ask a few questions as a part of their on-going investigation,” said A Majumdar, acting-chairman, KoPT.

Officials said the CBI has not found anything concrete so far in the port area since the Reddy brothers did not trade through the Kolkata port.

The CBI has registered a case against the two firms of the brothers - the Obulapuram Mining Company and the Bellary Iron Ore Pvt Ltd in — connection with illegal and unauthorised mining as well as the sale of the iron-ore.