According to the latest news, an Russian prosecution said, the firing order was released by Russian Federal Security Service.

据最新消息，俄罗斯检察官说，开火命令是俄联邦安全局下达的。

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Russian journalists have reported that the existence of Metro-2 is neither confirmed nor denied by the Federal Security Service of the Russian Federation (FSB) or the Moscow Metro administration.

对于俄罗斯新闻记者的报道，俄罗斯联邦安全局和莫斯科地铁局态度暧昧，不置可否。

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Selentsov revealed that Russian border guards had received fire orders from the Federal Security Service.

塞伦特·索夫透露，俄边防军接到了联邦安全局开火的命令。

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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