Russia Detains 12 in Connection with Moscow Concert Hall Attack, Tajikistan Arrests 9

The arrests relate to the deadliest attack in Russia in two decades, with the Islamic State claiming responsibility and Russia alleging Ukrainian involvement.

A total of 21 people have been arrested in Russia and Tajikistan in connection with the Moscow concert hall attack that killed 144.
Russia has detained 12 individuals, including a Tajik citizen, with nine facing pre-trial detention.
Tajikistan's state security service has detained nine people for suspected contact with the attackers.
Russia alleges Ukrainian and Western involvement in the attack, claims dismissed by Ukraine and the West.
The Islamic State has claimed responsibility for the attack, its deadliest on European soil.