The Russian Federal Security Service spokesman said he had no immediate information about Russian authorities contacting the FBI.

WSJ: Russia Distances Itself From Chechen Brothers

Five days later, FBI asked the Russian Federal Security Service, known as the FSB, for more information and received no response, one U.S. official said.

WSJ: U.S.: Russia Withheld Intel on Boston Bomb Suspect

Litvinenko's friends are urging British officers to question a jailed Russian intelligence officer who has accused the Russian Federal Security Service, the FSB, of creating a hit squad to silence Russian emigres in Britain.

NPR: U.K. Investigators Visit Moscow in Litvinenko Probe

All the more interesting therefore that the Russian Federal Security Service (FSB) has recently been co-operating with the Federal Bureau of Investigation (FBI) in arresting the alleged perpetrators of the December 2008 RBS WorldPay data breach.

FORBES: A Network Ambassador for a Networked Superpower

Intel has had a cozy relationship with the Russian government and its Federal Security Service (FSB) since 2002 with its sponsorship of a laboratory on wireless technology at Nizhny Novgorod State University (NNGU).

FORBES: Intel's McAfee Deal: A National Security Nightmare

The ministry said Russia's Foreign Ministry, the Federal Security Service and the Defense Ministry were alerted to the attack, and the Russian government established contact with rescue centers in nearby Seychelles and Kenya.

CNN: Ship escapes pirate attack off Somalia, Russia says

Estonia in 2007, Georgia in 2008 and Kyrgyzstan in 2009 were targets of massive denial-of-service attacks organized by FAPSI, the Russian Federal Agency for Government Communications and Information (the Russian national security agency) through a various proxies that gave FAPSI plausible deniability.

CENTERFORSECURITYPOLICY: The silent cyberwar