The US Embassy in Moscow has issued an emergency alert about a "credible threat" with mass casualties at the Tsaritsyno Museum Reserve in Moscow. "The US Embassy in Moscow has become aware of a credible threat of an event that could lead to mass casualties today, October 31, on the grounds of the Tsaritsyn Museum Reserve in Moscow at 1 Dolskaya Street, Moscow." The US embassy said it was coordinating the response with Russian authorities, and US citizens were urged not to visit the reserve under any circumstances.

The US Embassy in Moscow has issued an emergency alert about a "credible threat" with mass casualties at the Tsaritsyno Museum Reserve in Moscow. "The US Embassy in Moscow has become aware of a credible threat of an event that could lead to mass casualties today, October 31, on the grounds of the Tsaritsyn Museum Reserve in Moscow at 1 Dolskaya Street, Moscow." The US embassy said it was coordinating the response with Russian authorities, and US citizens were urged not to visit the reserve under any circumstances.