U.S. Embassy Warns of Potential 'Mass Casualty Event' in Moscow

Oct. 31, 2026 ALEXANDER NEMENOV / AFP The United States Embassy in Moscow on Saturday issued an urgent security alert, warning of a potential mass casualty event in the Russian capital. “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,” the statement said. The statement also warned people to avoid the area and take measures to ensure personal safety. Later on Saturday, state media reported that the Federal Security Service (FSB) had received information from the U.S. regarding the potential terrorist attack. “We have received information from U.S. partners regarding plans for a terrorist attack in Moscow. We are taking appropriate action,” the FSB told state media. In 2024, the U.S. 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 U.S. 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. Read more about: Terrorism , United States , FSB Sign up for our free weekly newsletter Our weekly newsletter contains a hand-picked selection of news, features, analysis and more from The Moscow Times. You will receive it in your mailbox every Friday. Never miss the latest news from Russia. Preview Subscribers agree to the Privacy Policy We sent a confirmation to your email. Please confirm your subscription. A Message from The Moscow Times: Dear readers, We are facing unprecedented challenges. Russia's Prosecutor General's Office has designated The Moscow Times as an "undesirable" organization, criminalizing our work and putting our staff at risk of prosecution. This follows our earlier unjust labeling as a "foreign agent." These actions are direct attempts to silence independent journalism in Russia. The authorities claim our work "discredits the decisions of the Russian leadership." We see things differently: we strive to provide accurate, unbiased reporting on Russia. We, the journalists of The Moscow Times, refuse to be silenced. But to continue our work, we need your help. Your support, no matter how small, makes a world of difference. If you can, please support us monthly starting from just $2. It's quick to set up, and every contribution makes a significant impact. By supporting The Moscow Times, you're defending open, independent journalism in the face of repression. Thank you for standing with us. Once Monthly Annual Continue Not ready to support today? Remind me later. × Remind me next month Remind me Thank you! Your reminder is set. We will send you one reminder email a month from now. For details on the personal data we collect and how it is used, please see our Privacy Policy. Read more Russian State Media Release Interrogation Videos of Concert Attack Suspects A graphic video shared online showed what was said to be one of the suspects having his ear cut off by law enforcement. 3 Min read 2 Kazakhs Killed in Russian Anti-Terror Operation Moscow claims that it prevented an attack against a synagogue in the Russian capital. 1 Min read Russia Says Arrests Ukrainian Spy Trio Amid Mounting Tensions The three men confessed to being recruited by Ukraine’s military and security services and were allegedly plotting terrorist attacks, the FSB said. Putin Criticizes U.S. Counterterror Cooperation with Russia Russian President Vladimir Putin has criticized the United States government's attitude toward counterterrorism cooperation with Russia, the Interfax news...