The USA warned Russia about the preparation of a terrorist attack near Moscow, but did not provide any specifics because of concerns about its intelligence methods. The New York Times writes about this, citing sources.

The NYT claims that, however, on the eve of the attack, a warning about its probability reached even Crocus, as told by a wardrobe employee. The staff was instructed what to do in case of an attack.

At the same time, reports from Russia's domestic intelligence service reportedly specifically mentioned the increasing probability of an attack in Russia by ethnic Tajiks associated with ISIS-K.

The warning from the Americans also stated that the terrorist attack was being prepared by a branch of the Islamic State known as ISIS-K, which had been monitored by American intelligence for several months.

They managed to obtain "quite specific information" about the preparation of a terrorist attack in Moscow.

On March 7, the day after the CIA sent a private warning to Russia, the FSB announced that it had killed two Kazakhs southwest of Moscow, foiling an ISIS-K plot to attack a synagogue in the capital. US officials saw this as a possible sign that Russian authorities were taking action.

A few days later, however, Putin dismissed the warnings as "outright blackmail" and attempts to "intimidate and destabilize society."

It should be noted that earlier the Russian FSB also stated that the US warnings were not specific.