Russia was aware of preparations for a terrorist attack on its soil at least since Feb. 15, Ukraine’s military intelligence chief Kyrylo Budanov said on March 27. Several gunmen opened fire at the Crocus City Hall in Krasnogorsk, Moscow’s suburb, on the evening of March 22, killing at least 139 people. A branch of the Islamic State (ISIS) claimed responsibility for the attack shortly thereafter. Russian authorities are currently holding eight people in pre-trial detention in connection with the terrorist attack. Russian top officials sought to connect the attack to Ukraine without providing an…