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.
Russian officials have claimed, without evidence, Ukrainian involvement. Kyiv says the claim is “absurd”.
The four were named as Dalerdzhon Mirzoyev, Saidakrami Murodali Rachabalizoda, Shamsidin Fariduni and Muhammadsobir Fayzov.
The video showed three of them being marched by masked police into Basmanny district court in the Russian capital. All appeared injured.
Mirzoyev and Rachabalizoda’s eyes were blackened and the latter’s ear was heavily bandaged – reportedly from it being partially severed during his arrest.
Mirzoyev also appeared to have a torn plastic bag wrapped around his neck
Fariduni’s face was badly swollen and Fayzov was brought into court in a wheelchair wearing a hospital gown,and appeared to have an eye missing, according to the Reuters news agency.
All were held in a glass-paneled booth and guarded by masked police during their time in court.
A court statement on the Telegram messaging service said Mirzoyev was a citizen of Tajikistan and “admitted his guilt in full”. Rachabalizoda also “admitted guilt”, it said.
All four are to be held in pre-trial detention until at least 22 May, the court added.
The men were arrested hours after four gunmen on Friday night stormed the Crocus City Hall in Krasnogorsk, a northern Moscow suburb, and began firing on some of the estimated 6,000 people who were attending a rock concert. The attackers also set fires which engulfed the venue and caused the roof to collapse.
Russian authorities said 137 people were killed and more than 100 injured.
