Remember folks, that Russia is but a co-belligerent (not an ally) in the war against jihad, and only where and when it suits their own self interests, not for the West/free world as a whole.
“The nine men, all from Central Asia, are charged with 17 murders and two attempted murders.” There were earlier, unconfirmed reports that this gang was recruiting for the Islamic State.
Hostage-taking is a practice that is sanctified in Sharia. Here is a salient passage on this issue from a Shafi’i manual of Islamic law:
When an adult male is taken captive, the caliph considers the interests … (of Islam and the Muslims) and decides between the prisoner’s death, slavery, release without paying anything, or ransoming himself in exchange for money or for a Muslim captive held by the enemy. (Umdat al-Salik (Reliance of the Traveller) o9.14)
A revered Islamic jurist, Al-Mawardi, agrees with Reliance of the Traveller:
As for the captives, the amir has the choice of taking the most beneficial action of four possibilities: the first, to put them to death by cutting their necks; the second, to enslave them and apply the laws of slavery regarding their sale or manumission; the third, to ransom them in exchange for goods or prisoners; and fourth, to show favor to them and pardon them. (Al-Ahkam As-Sultaniyyah (The Laws of Islamic Governance), 4.5)