Russian massacre suspects' homeland is plagued by poverty and religious strife
Four Tajik suspects linked to Islamic State group identified in Moscow theater massacre.
Tajikistan
The Moscow terror attack could drive a wedge between Russia and one of its longtime allies
ISIS-K claims responsibility for terror attack in Moscow, straining Russia's relationship with Tajikistan.
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.
Moscow concert hall attack suspects appear in court as Russia defends security services | CNN
Suspects in deadly Moscow concert hall attack appear in court on terror charges linked to ISIS.
Russian Court Remands 4 Suspects Over Concert Hall Attack - The Moscow Times
Moscow concert hall attackers ordered to be held on "terror" charges.