What is ISIS-K, the terror group claiming responsibility for the Moscow concert hall attack?
ISIS-K poses a persistent threat with ambitions to establish an Islamic State in Central Asia and employs social media for recruitment and outreach.
Islamic state
Moscow Terror Suspects Plotted Other Massacres in Europe
Several terrorist suspects linked to ISIS-K's mass shooting plot in Moscow have ties to past attacks in France.
ISIS behind brutal Moscow terror attack, France tells Russia, as Kremlin points to Ukraine
France, U.S. point to Islamic State in Moscow concert hall attack, while Russia blames Ukraine despite Islamic State claim.
France raises terror alert level after Moscow attack claimed by IS group
France raises security alert to highest level after attack claimed by Islamic State.
Russian Court Remands 4 Suspects Over Concert Hall Attack - The Moscow Times
Moscow concert hall attackers ordered to be held on "terror" charges.
ISIS-K, Group Tied to Moscow Attack, Has Grown Bolder and More Violent
ISIS-K militant group linked to terrorist attack in Moscow, aims to undermine Taliban authority in Afghanistan.