Russian Investigators Question Moscow Attack Suspects' Families in Tajikistan

Russian investigators are questioning the families of four men charged with carrying out a deadly attack on a concert hall near Moscow in Tajikistan. Tajik President Emomali Rakhmon is overseeing the investigation on the Tajik side, and the country is alarmed by the activity of radical Islamist preachers. The attack has been claimed by Islamic State, and at least two suspects have confessed to taking part in the attack. The incident has strengthened anti-immigrant sentiments in Russia, and videos showing the suspects being tortured have prompted a divided reaction.