Philip Shenon writes:

American intelligence and law-enforcement agencies, outraged by their inability to stop WikiLeaks and its release this week of hundreds of thousands of sensitive U.S. diplomatic cables, are convinced that the whistleblowing website is about to come up against an adversary that will stop at nothing to shut it down: the Russian government.

National-security officials say that the National Security Agency, the U.S. government’s eavesdropping agency, has already picked up tell-tale electronic evidence that WikiLeaks is under close surveillance by the Russian FSB, that country’s domestic spy network, out of fear in Moscow that WikiLeaks is prepared to release damaging personal information about Kremlin leaders.

“We may not have been able to stop WikiLeaks so far, and it’s been frustrating,” a U.S. law-enforcement official tells The Daily Beast. “The Russians play by different rules.” He said that if WikiLeaks and its founder, Julian Assange, follow through on threats to post highly embarrassing information about the Russian government and what is assumed to be massive corruption among its leaders, “the Russians will be ruthless in stopping WikiLeaks.”