U.S. Embassy in Moscow Warns of Mass Casualty Threat
RUSSIA — The U.S. Embassy in Moscow warned of a credible mass casualty threat at the Tsaritsyno Museum Reserve. Its October 31 alert urged people to avoid the site while U.S. officials coordinated with Russian authorities.
What the U.S. Embassy in Moscow said
The warning singled out the palace museum and park complex in southern Moscow. It applied specifically to October 31, 2026, and identified the location as 1 Dolskaya Street.
However, the embassy did not identify a suspected group or describe the threat’s method. Neither the public alert nor Reuters’ October 31 report confirmed an attack or casualties.
Russia acknowledges the American warning
Separately, Russia’s Federal Security Service, known as the FSB, acknowledged receiving American information about preparations for a terrorist attack in Moscow. The agency said the information arrived through established partner channels and that it was taking measures in response.
Meanwhile, Reuters reported on October 31 that authorities had temporarily closed Tsaritsyno and restricted access to its park. Reuters attributed that information to Russia’s RIA news agency, citing law enforcement.
Embassy urges avoidance and personal preparedness
Alongside the threat warning, the embassy urged U.S. citizens to avoid the museum area and crowds on October 31. It also advised them to review their personal security plans and monitor local reporting.
Additional precautions included keeping cellphones charged and carrying proper identification. The mission also recommended enrolling in the Smart Traveler Enrollment Program, or STEP, to receive official health and security updates.
Because the alert identified a specific date, readers should check subsequent embassy notices for updated guidance.
Russia remains under a Level 4 travel advisory
More broadly, the State Department maintains its Level 4 “Do Not Travel” advisory for Russia. It urges U.S. citizens already in the country to leave immediately.
The department cites terrorism, wrongful detention and dangers associated with the continuing war in Ukraine. In addition, it warns that the U.S. government has limited ability to help Americans, especially outside Moscow.
State says the embassy has reduced its staff, while Russian authorities restrict travel for embassy personnel. U.S. consulates elsewhere in Russia have suspended operations, including consular services.
For contractors with personnel in Russia, the alert warrants review alongside employer security guidance and the standing State Department travel advisory.