Russia's FSB security service says it has carried out "appropriate" measures after the US embassy in Moscow warned of a planned "terrorist" attack in the capital this weekend. FSB cites US-sourced warnings of a possible Moscow attack, as the U.S. Embassy warns of a credible threat to Tsaritsyno Museum Reserve. The embassy identified the location as Tsaritsyno Museum Reserve, at 1 Dolskaya Street, Moscow, and advised Americans to take precautions.