"133 Dead in Moscow Concert Hall Attack: US Warning Proves Prophetic"

The death toll in the Moscow concert hall attack has risen to 133, with Russia arresting 4 suspects and the Islamic State claiming responsibility. President Putin blamed "international terrorism" and suggested Ukrainian involvement, while state media cast doubt on the ISIS attribution. The attack, one of Russia's worst terrorist incidents, has prompted a national day of mourning and renewed focus on security failures. The tragedy occurred during a concert by the Russian rock band Piknik, and survivors have shared harrowing accounts of the attack. The U.S. has reiterated ISIS's sole responsibility, while Ukraine's president dismissed Putin's accusations and criticized Russian actions in Ukraine.