The embassies of the United States and the United Kingdom had warned of the possibility of a terrorist attack in Moscow. This Friday, several armed men opened fire on concertgoers at the Crocus City Hall in Krasnogorsk, near Moscow.
At least 40 people have died and a hundred more have been injured. The United States assured this Friday that there is no indication that Ukraine participated in the "horrible" attack.. Former Russian president Dmiti Medvedev stated that Russia will "destroy" the Ukrainian leaders if it is proven that they are involved in the attack.