U.S. government warned Russia that Crocus City Hall was a potential target.
Moscow claims the information was too general to prevent the attack. The high level of specificity in the warning underscores Washington's confidence that the Islamic State was preparing an attack that threatened large numbers of civilians. Russian President Vladimir Putin publicly rejected the US warnings just three days before the March 22 attack, describing them as “pure blackmail” and attempts to “intimidate and destabilize our society”