The US Embassy in Moscow warns of a credible threat of mass casualties at the Tsaritsyno Museum Reserve The US Embassy in Moscow issued a security alert today (October 31, 2026) stating that it is aware of a credible threat of a mass casualty event at the Tsaritsyno Museum Reserve (Dolskaya Ulyssa 1). The embassy is coordinating with Russian authorities and has advised people to avoid the area, remain vigilant and avoid crowds. Russia's Federal Security Service (FSB) confirmed it had received information from American partners about a planned terrorist attack in Moscow and said it was taking appropriate measures. No further details were given about the nature of the threat. The Tsaritsyno Museum Reserve is a palace complex and a central historical park in the south of Moscow.​​

The US Embassy in Moscow warns of a credible threat of mass casualties at the Tsaritsyno Museum Reserve The US Embassy in Moscow issued a security alert today (October 31, 2026) stating that it is aware of a credible threat of a mass casualty event at the Tsaritsyno Museum Reserve (Dolskaya Ulyssa 1). The embassy is coordinating with Russian authorities and has advised people to avoid the area, remain vigilant and avoid crowds. Russia's Federal Security Service (FSB) confirmed it had received information from American partners about a planned terrorist attack in Moscow and said it was taking appropriate measures. No further details were given about the nature of the threat. The Tsaritsyno Museum Reserve is a palace complex and a central historical park in the south of Moscow.​​