The Government today filed a report in the Supreme Court saying it has been unable to find the source which leaked the tapes containing conversation between corporate lobbyist Niira Radia and others including Tata Group Chairman Ratan Tata. "In a nutshell, the report says it is difficult to find by which source it was leaked," a bench comprising justices GS Singhvi and SJ Mukhopadhaya said, after perusing the report filed in a sealed envelope. The bench further said, "Regarding the source which leaked the tapes, they have been unable to find it."

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