The US Embassy in Moscow issued an urgent security alert warning of a "credible threat" of a mass casualty incident at Moscow's Tsaritsyn Museum Reserve on Saturday. The embassy said that the US authorities are coordinating with Russian officials in response to the threat. American citizens were urged to avoid the museum and the surrounding area, stay away from crowds, stay alert and monitor local media for updates.

The US Embassy in Moscow issued an urgent security alert warning of a "credible threat" of a mass casualty incident at Moscow's Tsaritsyn Museum Reserve on Saturday. The embassy said that the US authorities are coordinating with Russian officials in response to the threat. American citizens were urged to avoid the museum and the surrounding area, stay away from crowds, stay alert and monitor local media for updates.