[HIGHLIGHTS] Moscow attack: Islamic State confirms arrest of four jihadists

Islamic State confirms arrest of four of its members in Russia. Group claims responsibility for March 22 attack on Moscow concert hall.

At least 143 dead and 360 injured, including children, in the attack. Russian authorities continue to target Ukraine, which denies any involvement in the killing. The attack is the deadliest in the last twenty years in Russia, according to the Russian security services (FSB), who are still hunting the perpetrators of the event. FSB director Alexander Bortnikov accused Ukrainian and Western secret services of having “facilitated” the attack on Crocus City Hall.