Islamic State launched a major recruitment drive last year aimed at militants from Tajikistan and other central Asian countries and specifically targeting experienced members of existing groups with a long history of terrorist attacks, western and other intelligence services have said.
Three of the four men detained by Russian security forces for the attack at a Moscow concert hall on Friday night are thought to be Tajik nationals or of Tajik origin. Video clips of the interrogation of four alleged attackers detained by Russian security forces showed at least one speaking Tajik.
