Moscow attack: eighth suspect placed in pre-trial detention. Suspected of having played a role in Friday evening's attack on a Moscow concert hall.
In total, Russian authorities reported the arrest of 11 people, including four attackers, in connection with this attack. Russian President Vladimir Putin acknowledged on Monday for the first time that the attack, claimed by the jihadist group Islamic State (IS), had been committed by "radical Islamists" Russian security services (FSB) also said on Tuesday that a national belonging to a pro-Ukraine group was killed in the explosion of his bomb at the time of his arrest.