Moscow attack: what is the profile of the four alleged attackers arrested by Russia?. Russian authorities say they have arrested several suspects after the deadly attack on a concert hall, including four assailants.
The assault, followed by a large fire in the building, was claimed by the Islamic State (IS), which assured that the perpetrators had fled. For their part, Russian security services continue to blame Ukraine, while kyiv denies any involvement. For the moment, Russia has not commented on the IS claim and continues to make the link with Ukraine.