The CBI is contemplating booking some of the people whose premises were searched in connection with  the 2G scam under the Official Secrets Act after it claimed to have found mirror images of certain government documents classified as "secret" from the computers seized.

Sources said that the agency has also come across mention of some such documents in the conversation tapped by the Income Tax authorities.

The authorities, including the CBI and Enforcement Directorate, were analysing the purported telephone calls made by corporate lobbyist Niira Radia and others including a former bureaucrat and a journalist during which secret documents were being discussed, they claimed.

The sources said there were several other calls made during the monitoring of telephone lines of Radia and her office Vashinavi corporate communications, searched by the CBI on December 14, which were allegedly indicative of leakage of certain sensitive, confidential and restricted documents.

An analysis of the computers show prima facie there were some such documents which had been recovered from the computers seized from various locations searched by the CBI on two occasions this month, the sources alleged.

Sources in the Government said that legal opinion was being sought on whether some of the people could be booked under the OSA for procuring sensitive documents classified as "secret", "confidential" and "restricted".

The sources said while this was not a new phenomenon, efforts from government departments were lacking in preventing confidential documents being leaked to such lobbying firms.

Intelligence Bureau had been informing the government about the such leakage in the past.

The people including former Disinvestment Secretary Pradip Baijal, Radia, former private secretary of A Raja, R K Chandolia, would be questioned about these documents besides verifying from the ministries from where these documents were leaked, the sources said.