MOSCOW: The United States Embassy in Moscow on Saturday warned of a “credible threat of a mass casualty event” at the Tsaritsyno Museum Reserve, a palace museum and park in the Russian capital, urging people to avoid the area.
“The US Embassy in Moscow is aware of a credible threat of a mass casualty event TODAY October 31, at the Tsaritsyno Museum Reserve in Moscow at Dolskaya Ulitsa 1, Moscow, Russia 11569,” it said.
The US Embassy said the US government is coordinating with Russian authorities in response to the threat. “The US government is coordinating with appropriate Russian authorities on a response,” the statement said.
Security Alert: Threat to Tsaritysyno Museum Reserve in Moscow
The U.S. Embassy in Moscow is aware of a credible threat of a mass casualty event TODAY October 31, at the Tsaritsyno Museum Reserve in Moscow at Dolskaya Ulitsa 1, Moscow, Russia 11569. The U.S. government is coordinating with appropriate Russian authorities on a response.
Actions to take:
Avoid the Tsaritsyno Museum Reserve location TODAY, October 31, 2026. Avoid the area, stay alert, and avoid crowds.
Be aware of your surroundings.
Review your personal security plan.
Keep your cellphone charged in case of emergency.
Carry proper identification.
Monitor local media for any further information
Enroll in the Smart Traveler Enrollment Program (STEP ) to receive health and security updates.Assistance:
U.S. Embassy Moscow, Russia
+7 495 728-5577
[email protected]
U.S. Embassy Moscow web page
State Department – Consular Affairs (+001) 888-407-4747 or (+001) 202-501-4444
Russia Country InformationFollow us on Facebook and Twitter
State Department – Consular Affairs
1-888-407-4747 or 1-202-501-4444
— Посольство США в РФ/ U.S. Embassy Russia (@USEmbRu) October 31, 2026
The embassy urged people to avoid the museum, remain alert, and avoid crowds to ensure personal safety.
The Russian Federal Security Service (FSB) told state news agency TASS that it had received information from US partners about preparations for a potential “terrorist attack” in Moscow and that appropriate measures were being taken.
“We have received information from US partners regarding plans for a terrorist attack in Moscow. We are taking appropriate action,” the FSB told state media.
Russia’s Federal Security Service is acting on a US warning about preparations for a terrorist attack in Moscow, the agency told TASS:
https://t.co/HBUILM1pTF https://t.co/gZ9wv3XVoo— TASS (@tassagency_en) October 31, 2026
The Tsaritsyno museum is an imperial palace and park complex in southern Moscow that is a popular place to visit, especially on weekends.
Russian Telegram channel Baza said the park was now closed and “open only for exits”. “Law enforcement officers are on the premises,” it reported.
🇷🇺 Moscow: all roads to the Tsaritsyno museum-reserve are closed, with security services on site
The US Embassy in Moscow has warned of a “credible threat of an event that could cause mass casualties” at Tsaritsyno today, October 31, and urged Americans to stay away from the area.
The FSB says it received information from the American side through partner channels about a terrorist attack being prepared in Moscow, and that it is acting on it.
Police have sealed off the park, traffic is blocked on surrounding streets, and visitors have reportedly been evacuated.
In March 2024, the US Embassy issued a similar warning about large gatherings in Moscow two weeks before the Crocus City Hall attack.
— DD Geopolitics (@DD_Geopolitics) October 31, 2026
The Tsaritsyno Museum Reserve has been temporarily closed and access to the park is currently restricted, the RIA news agency reported, citing Russian law enforcement agencies.
ФСБ получила от США информацию о подготовке теракта в Москве
https://t.co/qATQmYdfpo— РИА Новости (@rianru) October 31, 2026
In March 2024, the US warned Moscow of an impending terrorist threat ahead of the March 22 Crocus City Hall attack, which left 145 people dead and hundreds more wounded.
At the time, Russian spy chief Sergei Naryshkin called the information “too general.”
“The Federal Security Service (FSB) received some information from the US intelligence services that such a thing was unfortunately possible. But as our Russian colleagues said, the information was too general and did not allow us to fully identify those who committed this terrible crime,” he said.
Founded in 1775 as a summer home for Russia’s Catherine II, the Tsaritsyno Museum is now a popular tourist attraction in Russia’s capital.
The museum itself attracted more than two million visitors in 2022, Moscow’s deputy mayor Natalya Sergunina said in 2023. The surrounding grounds, enjoyed by Moscow’s local citizens for physical activity and dog walking, see even more foot traffic, according to The Art Newspaper.
The US Embassy’s alert also included a warning to people in the Moscow area to keep cell phones and other batteries charged, stay aware of surroundings, and to review a personal security plan.
The alert was issued as tensions in the ongoing war between Russia and Ukraine continue to escalate.
On Friday, Ukraine struck an oil refinery in southern Russia, ending a two-week pause on energy infrastructure attacks brokered by US President Donald Trump between the warring nations.
The previous day, Russian drone and missile strikes in Ukraine killed at least 27 people, according to the Wall Street Journal.
