Russia Detains Minor Over Tsaritsyno Park Threat After U.S. Tip, FSB Says

Since the U.S. Embassy in Moscow warned on Saturday, Oct. 31, of a "credible threat of a mass casualty event" at the Tsaritsyno Museum Reserve, Russian security officials have said they detained a suspect.

The Federal Security Service (FSB) said on Sunday, Nov. 1, that it "verified" the information it received from U.S. law enforcement. "As a result of these operations, a Russian minor was detained," the agency said in a statement carried by Russian news agencies.

What the FSB says it found

The FSB described the suspect as a Russian citizen and a male teenager. It did not name him.

According to the FSB, he posted photos on TikTok showing himself in tactical clothing, a balaclava, a cap, protective eyewear and headphones, holding an object resembling an automatic weapon. Other photos were taken at Tsaritsyno, captioned in English: "I found a place."

The FSB said a search of his home turned up the clothing and accessories seen in the posts. His phone, it said, showed a subscription to a neo-Nazi Telegram channel and "a significant number of searches concerning terrorist attacks, mass killings and other acts of violence."

These details come from the FSB's own account, relayed through Russian news agencies. No independent confirmation has been made public.

The FSB said Russia's Investigative Committee is considering what legal or procedural action to take.

The U.S. warning and the park closure

The embassy alert said the threat applied to Oct. 31 at the Tsaritsyno Museum Reserve on Dolskaya Ulitsa. It told people to avoid the area, stay alert and avoid crowds. It also advised people in the Moscow area to keep phone batteries charged and review their personal security plans. The U.S. government, the alert said, was coordinating with Russian authorities.

The FSB said Saturday that it had received information from the United States through established partner channels about preparations for an attack in Moscow and was taking appropriate measures. The German embassy in Moscow also issued a warning to avoid Tsaritsyno, according to a DPA report.

The grounds were closed Saturday. Russian state media said the closure was "for technical reasons," and visitors were evacuated. Russian media reported the site reopened as usual on Nov. 1.

The Moscow Times reported that the park was evacuated during a concert by musician Lilia Pechenkina. She told the outlet Ostorozhno, Novosti: "Just as I was playing the last piece in the program, an evacuation announcement came over the loudspeaker."

A rare public thank-you

The FSB's statement included an unusual line for the current moment. "We are grateful to the American side for providing the information," the agency said.

There is precedent for U.S. warnings to Moscow. Washington warned Russia about a potential attack in March 2024, weeks before the Crocus City Hall assault near Moscow, which killed more than 140 people according to NBC News and Al Jazeera, and was carried out by an affiliate of the ISIL group.

The latest exchange comes against a tense backdrop. The two countries remain at odds over Russia's war in Ukraine. AFP noted that relations have thawed in recent months, even as Washington and Kyiv strain over a U.S.-Russia diesel deal. Fox News reported that Ukraine struck an oil refinery in southern Russia on Friday, ending a two-week pause on energy infrastructure attacks brokered by President Donald Trump.

What remains open

The FSB's account describes a teenager who posted photos in tactical gear and photographed a park. It has not said he had a plan, accomplices, weapons or a timeline, and it has not said whether the object in his photos was a real firearm. The FSB's wording, an "object resembling an automatic weapon," leaves that open.

The U.S. Embassy alert named no suspects and described no plot. Neither Washington nor Moscow has said how the tip was developed or whether the detained teenager was the source of the threat the embassy described. Fox News said it contacted the embassy for further information.

The next concrete step is the Investigative Committee's decision on what legal or procedural action to take.