The U.S. Embassy in Moscow warned of a credible threat of a mass casualty event at the Tsaritsyno Museum Reserve, urging people to avoid the area.
https://www.foxnews.com/world/us-embassy-warns-credible-mass-casualty-threat-popular-moscow-tourist-attraction
https://www.foxnews.com/world/us-embassy-warns-credible-mass-casualty-threat-popular-moscow-tourist-attraction