Four defendants charged with committing a terrorist act in the Crocus City concert hall attack were individually brought to court in Moscow on Sunday. They are accused of violating part 3, provision 'b' of article 205 of the Russian Criminal Code, which carries a penalty of up to life imprisonment.
According to state media news agency TASS, three of the defendants pleaded guilty to all charges.
Here is what is known about the accused:
Dalerdzhon Mirzoyev: The 32-year-old defendant, originally from Tajikistan, had a temporary registration in Novosibirsk, Siberia, which had expired.
Saidakrami Rachabalizoda: The second defendant, born in 1994, claimed to have Russian registration documents but could not recall their whereabouts. He communicated through an interpreter during the court proceedings.
Shamsidin Fariduni: Born in 1998 in Tajikistan, Fariduni is a citizen of Tajikistan. He was employed at a factory in Podolsk, Russia, and was registered in Krasnogorsk.
Muhammadsober Faizov: The fourth defendant, born in 2004, appeared unresponsive in a wheelchair and was accompanied by a doctor to court. Faizov, who was temporarily unemployed, previously worked at a barber shop in Ivanovo, northeast of Moscow, and is registered in that city.