Putin dismissed US warnings about a potential terror incident as 'blackmail' just 3 days before concert hall attack
"The Embassy is monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and U.S. citizens should be advised to avoid large gatherings over the next 48 hours," the March 7 security alert said.
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… Russia's Federal Security Service, or FSB…called the incident a "terrorist attack."
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Putin addressed the warnings a couple weeks later, criticizing the warning three days ago as "provocative."
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"All this resembles outright blackmail and the intention to intimidate and destabilize our society," Putin said, according to state media reporting on his remarks.