A terrorist attack may occur today in Moscow - the US Embassy issued an emergency warning "The US Embassy in Moscow has become aware of a credible threat of an event that may cause mass casualties today, October 31, on the territory of the Tsaritsyno Museum Reserve at 156 Moscow Street, Russia, Government of Moscow, 1 Dolska, Russia. Coordinating response measures with the relevant authorities of the Russian Federation," the official statement said. Diplomats strongly advise not to approach the specified area today.