Russia will observe a national day of mourning after a massacre in a Moscow concert hall that killed more than 130 people, the deadliest attack in Europe to have been claimed by the Islamic State Afghan branch (I.S.I.S.-K).
Russia will observe a national day of mourning after a massacre in a Moscow concert hall that killed more than 130 people, the deadliest attack in Europe to have been claimed by the Islamic State Afghan branch (I.S.I.S.-K).