A trial has begun under tight security for 19 defendants accused of involvement in last year’s shooting rampage in a Moscow concert hall that killed 149 people and wounded over 600 in one of the deadliest attacks in the capital in years.

Three of four Tajik nationals accused of carrying out the March 2024 terror attack—in which more than 140 people died at the Crocus City Hall concert venue in outer Moscow—on August 4 pled guilty on the first day of their trial.

A trial began Monday under tight security for 19 defendants accused of involvement in last year’s shooting rampage in a Moscow concert hall that killed 149 people and wounded over 600.