The head of Russia's national security council suggested that the United States shares blame for the Moscow concert hall attack that killed 144 people, despite the Islamic State claiming responsibility. Russian officials, including President Putin, have accused Ukraine, without evidence, of organizing the attack. Patrushev claimed the attack's "customer and sponsor" leads to Ukrainian special services, controlled by the US. The SCO meeting in Kazakhstan discussed these claims. Russia arrested suspects linked to the attack, alleging they were heading to Ukraine.