Russia has charged four men it says attacked a Moscow concert hall and killed at least 137 people.
Three were marched bent double into a Moscow court while the fourth was in a wheelchair. All were charged with committing an act of terrorism.
The Islamic State group, or IS, said it carried out Friday’s outrage at Crocus City Hall, and posted video evidence.
Russian officials have claimed, without evidence, Ukrainian involvement. Kyiv says the claim is “absurd”.
