White House says US passed written warning of Moscow attack to Russia

The White House on Thursday described as "nonsense" Russia's allegation that Ukraine was involved in the attack on the Crocus City concert hall, saying it was clear that Islamic State was "solely responsible."

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

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