US had warned Russia ISIS was determined to attack

The US warned Moscow about the ISIS threat in the days leading up to the Crocus City Hall attack. President Putin dismissed the warning as ‘provocative.’ Gunmen stormed the concert hall, killing many people. ISIS claimed responsibility for the attack. Experts believe this attack will embarrass Putin, as he had emphasized national security in the recent election. Russian intelligence failed to prevent the attack, despite specific warnings from the US. Putin criticized the American warnings, calling them ‘blackmail.’ Russia had previously reported ISIS-related incidents. The US had ongoing intelligence indicating that ISIS-K intended to attack Russia. The US has no reason to doubt ISIS’ claim of responsibility for the attack. As a result of the attack, the US advised citizens not to travel to Russia.