U.S. Warns of Mass-Casualty Threat at Moscow Museum

The U.S. Embassy in Moscow warned of a credible threat of a mass-casualty event at the Tsaritsyno Museum Reserve on October 31, prompting a response from Russian security officials and travel advice from Canada. The embassy’s alert named the palace and park complex in southern Moscow and urged people to avoid the site, stay away from crowds and remain alert. It said the U.S. government was coordinating with appropriate Russian authorities. The warning did not identify a suspected perpetrator or describe the nature of the threat. Russia’s Federal Security Service, or FSB, said it had received information from the United States about preparations for a possible terrorist attack in Moscow and that appropriate action was underway. The service’s statement was carried by Russian news agencies. Authorities have not publicly disclosed further details about the alleged preparations or said whether an attack was prevented. Reports about access to the reserve differed in precision. Russian media accounts attributed to law enforcement or local sources said the site was closed or restricted; one account said visitors could leave but were not being admitted. The reports do not establish a...