And it says the US government is now coordinating with Russian authorities on this.
Russia's FSB has confirmed it too. It says the US passed on information about a terrorist attack being planned in Moscow. But the FSB didn't say when. Didn't say where. And didn't name Tsaritsyno at all.
The museum reserve itself says it has no information about any threat. It says it's operating as usual. Concerts were planned there today, at 5pm and 6pm, along with exhibitions and workshops.
That's everything we know.
Why this mattersSo why would America warn Russia at all? They're barely on speaking terms most of the time.
Washington calls it a "duty to warn" policy. The US has to flag threats to life, even to a government it doesn't get along with.
And right now, the two sides are getting along better than they have in years. This warning lands right in the middle of weeks of US-Russia talks to end the war in Ukraine. One government quietly tipping off the other's security service? That tells you how far that thaw has gone.
But here's the thing. This has happened before. And it did not end well.
Back in March 2024, the US embassy gave Moscow a near-identical warning. Large gatherings. Concerts. Vladimir Putin called it "outright blackmail."
Days later, gunmen hit the Crocus City Hall concert venue outside Moscow. The Islamic State said it carried out the attack. American officials blamed its branch in Afghanistan, ISIS-K. Reuters put the death toll at 149. Russian investigators first said 133, then raised it to 137.
Afterwards, the head of the FSB, Alexander Bortnikov, said the American tip had been too general to act on.
That's Russia's own security chief saying the warning wasn't specific enough.
And this time? The FSB's statement is general again. An attack planned in Moscow. No site named. No date given.
The FSB says quote "the service's officers are carrying out the necessary work".
That's Russia saying it's looking into it. Nothing more than that.
No arrest yet. Nobody has said they are behind it. No incident reported at Tsaritsyno so far.
The US still rates Russia at its highest travel warning level, Do Not Travel, citing terrorism. That's been standing policy for years.
So three questions are still open. Who is behind this. Whether Tsaritsyno is really the target. And whether today passes quietly, or repeats March 2024.