Journalist Shane Harris, writing in The Washington Post, reports that two weeks before the terrorist attack in Moscow's Crocus City Hall, US authorities warned their Russian counterparts about the potential threat to the concert hall.

According to American officials familiar with the matter, the US informed Russia over two weeks beforehand that Crocus City Hall could be a target for terrorists. This information was relayed to the Russian Federation the day before the US Embassy in Moscow issued a warning about a possible terrorist attack in March.

The report highlights the risk taken by Washington in sharing this intelligence, as it could potentially compromise intelligence sources.