U.S. Warned About Possible Moscow Attack Before Concert Hall ShootingThe U.S. Embassy in Moscow issued a security alert warning of imminent extremist plans in Moscow.American officials are concerned about potential false blame on Ukraine for attacks by President Putin.
US and UK warn 'extremists have imminent plans to target large gatherings in Moscow'US and UK issue imminent threat warnings for large gatherings in MoscowCitizens advised to avoid large gatherings and be vigilant in Moscow