The White House on Thursday dismissed as “nonsense” Russia’s charge of Ukraine’s involvement in last week’s attack on Moscow’s Crocus City concert hall that claimed more than 140 lives, Paralel.Az reports citing Reuters.

In a briefing to reporters, White House national security spokesman John Kirby said that the United States passed to Russian security services a written warning of an extremist attack on large gatherings in Moscow, one of many provided in advance.