Since then, the group has taken responsibility for a series of bombings and shootings, including 20 in the North Caucasus, according to Caucasian Knot.
www.kekenet.com
伏尔加格勒与北高加索地区接壤,安全问题尤其引人担心。
Volgograd, which borders the North Caucasus region, is a particular security concern.