Story highlights Rustam Magomedovich Aselderov pledged allegiance to ISIS in 2014, Russia saysHe was wanted in connection with the 2013 terrorist attacks in Volgograd(CNN) The leader of a North Caucasus ISIS branch was killed in a special operation conducted by Russian Federal Security Service forces in collaboration with the Ministry of Interior, the security service said in a statement Sunday. Security forces surrounded a residence where the militants were hiding. During negotiations to surrender, the militants fired automatic weapons and government forces fired back. Officials seized automatic weapons, large quantities of ammunition and explosives from the site, the FSB said. Aselderov pledged allegiance to ISIS in 2014 before becoming the leader of the so-called "Vilayat Caucasus" in 2015, according to the FSB.

Source: CNN December 04, 2016 05:07 UTC