Deadly terror attack at Moscow concert hall by armed men

In a terror attack at a Moscow concert hall, four armed men arrived in a mini-van, shooting at civilians before setting fire to the building. Over 143 people were killed, making it Russia's deadliest attack since 2004. Islamic State claimed responsibility. The attackers were detained in the Bryansk region. Witnesses described chaos as people tried to escape the gunfire and flames, with the hall ultimately gutted by the blaze.