- Putin acknowledges ‘radical Islamists’ carried out Moscow terror attackPOLITICO Europe
- Russia says suspects in Crocus concert hall attack detained as death toll rises to 137CNN
- ‘Duty to warn’ guided US advance warning of the Moscow attack. Adversaries don’t always listenThe Associated Press
- Vladimir Putin blames ISIS and Ukraine for Moscow concert attackUSA TODAY
- Russia’s tragedy, Putin’s humiliationThe Atlantic