Two of four suspects that carried out the attack in a Moscow concert hall that killed at least 137 people have been charged in Russia.
Dalerdzhon Mirzoyev and Saidakrami Murodali Rachabalizoda were pictured in a Moscow court as they faced a charge of committing an act of terrorism.
Islamic State has said it carried out March 22 outrage at Crocus City Hall.
Russian officials have claimed, without evidence, Ukrainian involvement. Kyiv says the claim is “absurd”.
Moscow Attack: At Least 133 Killed as Gunmen Open Fire at Music Venue
According to the AFP news agency, Dalerdzhon Mirzoyev was named as a citizen of Tajikistan. The nationality of Saidakrami Rachabalizoda was not disclosed.
Two other suspects were brought to the court, but have yet to be charged.