US warns Russia of planned terrorist attack in Moscow - FSB Russia's Federal Security Service (FSB) said it was working on a tip concerning a planned terrorist attack in Moscow that it received from American colleagues "on partner channels. "In a statement to Russian media on Saturday, the FSB stopped short of providing further details, stating that "relevant steps are being taken. " Earlier today, the US Embassy in Moscow issued a security alert, citing a "credible threat of a mass casualty event today, October 31, at the Tsaritsyno Museum Reserve in Moscow. The US government is coordinating with the appropriate Russian authorities on a response," US diplomats added.

US warns Russia of planned terrorist attack in Moscow - FSB Russia's Federal Security Service (FSB) said it was working on a tip concerning a planned terrorist attack in Moscow that it received from American colleagues "on partner channels. "In a statement to Russian media on Saturday, the FSB stopped short of providing further details, stating that "relevant steps are being taken. " Earlier today, the US Embassy in Moscow issued a security alert, citing a "credible threat of a mass casualty event today, October 31, at the Tsaritsyno Museum Reserve in Moscow. The US government is coordinating with the appropriate Russian authorities on a response," US diplomats added.