A terrorist attack may occur today in Moscow - the US Embassy issued an emergency warning "The US Embassy in Moscow has been made aware of a credible threat of an event that could result in mass casualties today, October 31, on the grounds of the Tsaritsyn Museum Reserve in Moscow at the address: Dolska Street, 1, Moscow, Russia, 115569. From the official statement of the Russian Federation, the official response of the Russian Federation was given. Diplomats strongly advise not to approach the specified area today. In the past, American diplomats made such a message before attack in Karchum. But that time, unlike today's report, the exact location was not specified.