The United States Embassy in Moscow issued a rare public alert warning of a credible threat of a mass casualty event at a major tourist destination on Saturday.
The security alert, posted Saturday, identified the Tsaritsyno Museum Reserve at Dolskaya Ulitsa 1 as the specific target. “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 Ultisa 1, Moscow, Russia 11569,” the embassy wrote in its statement. The sprawling palace grounds, founded in 1775 as Empress Catherine II’s summer home, cover roughly 1,000 acres south of the capital and drew more than two million visitors in 2022, according to deputy mayor Natalya Sergunina.
The embassy urged Americans in Russia to stay alert, avoid the area and crowds, and keep cellphones charged. Russian authorities moved quickly to restrict access. The hotspot has been temporarily closed and park access is also restricted, RIA news agency reported, citing Russian law enforcement agencies.
Russia’s Federal Security Service acknowledged receiving the tip and indicated it was acting on it. “We have received information from U.S. Partners regarding plans for a terrorist attack in Moscow. We are taking appropriate action,” the FSB stated. The cooperation marked a notable moment of intelligence sharing between the two countries, whose relations have deteriorated sharply since Russia’s full-scale invasion of Ukraine in 2022.
The warning carried added weight because of recent history. The US previously warned Moscow of the March 22, 2024 Crocus City Hall terror attack that left over 140 people dead and hundreds more wounded. On March 7, 2024, two weeks before that massacre, the US Embassy warned that “extremists have imminent plans to target large gatherings in Moscow, to include concerts.” The Islamic State group claimed responsibility for the Crocus City Hall attack, which became the deadliest terror incident in Russia in two decades.
Saturday’s alert did not specify the nature of the threat or identify any group believed to be behind the planned attack. The precise timing and methodology remained undisclosed in the public warning. The embassy’s decision to name the specific address and date represented an unusually detailed level of disclosure for such security alerts.
The Tsaritsyno Museum Reserve, with its ornate palace complex and extensive parklands, ranks among Moscow’s most visited cultural attractions. The 2022 visitor figure reported by Sergunina underscored its popularity as a destination for both tourists and local residents seeking recreation south of the city center. The temporary closure on one of the year’s final days of mild weather likely disappointed weekend visitors.
The intelligence sharing between Washington and Moscow on terror threats has continued despite the broader collapse of bilateral relations. The FSB’s public confirmation of receiving the information, rather than dismissing or ignoring the American warning, suggested Russian authorities took the threat seriously enough to act on it and to say so openly.
The Crocus City Hall attack had exposed vulnerabilities in Russian security preparations and sparked criticism of authorities for failing to prevent the massacre despite the earlier US warning. The death toll from that assault, carried out by gunmen who opened fire on concertgoers before setting the venue ablaze, exceeded 140 with hundreds more injured.
Russian officials had initially downplayed or disputed some foreign intelligence assessments in the past, making the FSB’s prompt acknowledgment of Saturday’s warning notable. The closure of such a prominent public space indicated the threat was treated as immediate and serious rather than speculative.
The embassy’s alert format followed standard security messaging for Americans abroad but contained an uncommonly specific location and same-day timeframe. No further updates were issued publicly as Saturday progressed regarding whether any suspects had been identified or apprehended.