Russia detains 17-year-old after US tip on planned Moscow museum attack

The US Embassy in Moscow issued multiple warnings of an imminent mass casualty event, specifically citing the Tsaritsyno district and museum, with some reports indicating a planned attack for Saturday or October 31. Russia's FSB subsequently detained a teenager suspected of plotting an attack in Moscow, crediting a US intelligence tip. The specific nature of the threat and the suspect's identity remain largely undisclosed, but the coordinated warnings and subsequent arrest suggest a credible, albeit contained, threat.