The three are suspected of being ringleaders of a regional cell of the North Caucasus-based terrorist group CaucasusEmirate.
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2.
Much of the insurgency aims to make Dagestan a part of a pan-North Caucasus Islamist state which rebels have dubbed the Caucasus Emirate and install putative rebel leader Doku Umarov as its emir.
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3.
One example of the shift was a 2007 video released by Mr. Umarov, the Chechen rebel commander, in which he claimed to have dissolved Chechnya's borders and created a CaucasusEmirate.