He has been dubbed “Russia’s bin Laden” and declared public enemy number one.
Doku Umarov is seen as the leader of the Islamist insurgency in the North Caucasus. But he has also been linked to a campaign of violence closer to the Kremlin.
Umarov is said to have ordered Moscow’s deadly Metro bombings in 2010 and the earlier devastating attack on a train from Moscow to St. Petersburg.
As the self-styled Emir of the Caucasus, he seeks to create a pan-Caucasus state independent from Russia and governed by Islamic Sharia law.
Some reports link Umarov to the 2004 Beslan school siege. He says he has visited the group that claimed to be behind the massacre in which more than 320 people died.
Seven years after Beslan, the bloodshed goes on and not only in the Caucasus. Rebels have now shown several times they can strike in the heart of Moscow.